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GTX 680 sli not outperforming single 680

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  • PC gaming
  • Video Games
Last response: in Video Games
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January 15, 2013 1:47:53 AM

(For some reason I found my first post in the wrong thread area -sorry)

Hey everyone. This is my first post. Really grateful there's a community like this to help. And FYI: I'm not posting before spending a week (for about 4 hours each day) having searched threads all over the web for similar problems and attmepting the proposed solutions as well as finding a hundred differrent ways to 'google' the same issue.

Here are my specs:

PSU: 650w (can't remember brand but it's excellent and gets screaming reviews)
MOBO: Gigabyte P55A-UD3
CPU: i5 760
Ram: 4GB
GPU: 2x EVGA Superclocked Signature GTX 680
OS: Windows 7
Nvidia Driver: 310.90
ASUS 23.6 Display (1920x1080p @60hz native)

Sli is not officially supported by my mother-board (as I have a 16x and 4x PCI slots) so I am using "HyperSLI" to access SLI functionality. I have confirmed that the issue I'm having isn't to do with the limitations of the bus speed as I have benchmarked my cards in their respective slots bringing these results:

Gpu 1 :p 8373 x16 slot
Gpu 2: P7966 x4 slot

(approximately a 5% differrence)

I doubt this should be having such an adverse impact.

SLI 3D Mark 11 score:
P11223 -this score seems slightly higher than the common scores for my rig.

I acheived this after:
-disabling USB 3.0 and SATA 6 (to minimize drain on shared PCI resources)
-and setting CPU performance enhancer (in GB BIOS) to Extreme (options being Extreme, turbo and standard) -note these are just presets -they're not any form of overclock.

Metro 2033 has shown a marked improvement from SLI with the GPU usage being in the 70-80 range in 1080p and maxed settings with 4xmsaa -definitely seeing the benefit of 2 cards as opposed to one.

However; Crysis 2, Battlefield 3 and Far Cry 3 are all having a similar issue.

With a single GPU, the usage is around 70-80% and I'm getting what you'd expect from a single GTX 680.
When running SLI, both GPU's usage is around 40-50% and I'm getting the performance you'd expect from a SINGLE GTX 680 still.

By performance I'm referring to Frame rate.

In battlefield 3 on larger maps (all settings maxed 1080p, v sync off, motion blur max, 4xmsAA (ultra) I'm hovering between 70fps and 80 with regular drops to 60s and 50s and occasional (but still often) drops to 40s when looking over a large section of the map.

In BF3 my CPU usage during SLI is up around 75-88%.

I've of course reinstalled the drivers multiple times.

Any thoughts dudes?

More about : gtx 680 sli outperforming single 680

January 15, 2013 12:02:58 PM

I suspect the games that show no benefit in SLi are limited by the processor not the graphics cards.
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January 15, 2013 12:07:45 PM

Possible CPU bottleneck to be honest. It's fairly outdated unless you have a huge OC on it.
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January 15, 2013 1:01:24 PM

Might well be that. Your current CPU is weaker than most modern I3's. For a setup like that, I'd want a modern, overclockable sandy- or ivy-bridge I5. Heck, you might even want to wait until Haswell. Not that'd be absolutely necessary. A modern I5 would be very unlikely to bottlneck that configuration, especially if overclocked.
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January 15, 2013 1:11:08 PM

I thought CPU bottleneck until I saw what he's using (which is still an extremely capable CPU - no worthwhile gains from any current-gen or even previous-gen CPU over the i5 750 for gaming). And until I saw his CPU usage isn't at 100% anyway.
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January 15, 2013 1:21:51 PM

I was thinking possibly CPU, or possibly poor SLI optimisation. Latest beta drivers?

Also HyperSLI? could cause the issues in unsupported games? latest version? adds overhead?
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January 15, 2013 1:25:14 PM

Yeah I don't know about HyperSLI, but it does seem to be the odd point here. Those games are not badly optimised for SLI and the CPU is excellent.
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January 15, 2013 2:01:27 PM

Yeah I've been wondering if CPU has been to blame here. I'm sure an upgrade of CPU wouldn't hurt but somehow I wonder whether it would bottleneck 2 680s to the point of performing at the maximum ability of one card.

Just to clarify -it's an i5 760. There seems to be some divided opinions on the ability of my current CPU to deliver on the demands of my rig (and of course factoring in that some games demand more GPU and some demand more CPU). Can anyone say for certain and with confidence whether my CPU will cut it?

Are there any conclusive tests I can run to see whether the CPU is restricting my GPU in the games in question or even in general?

I've also made sure to obtain the LATEST version of Hypersli. Although I do agree it is the odd link in the chain (that and my mobo not being sli certified officially -having established only a 5% loss on the 4x port).

Options I have considered:
-New Mobo (would eliminate the need for HyperSLI)
-OC the CPU, adding a fan and beefier PSU to support it.

Or both above options -spending money is a last resort but I'm willing to do it if it's the only SURE solution. Not because I'm cheap but because in the last month I've forked out a grand just on GPUs.

It's strange because my 3D mark 11 score is evidence to me that the system is capable of performing very well (metro 2033 is an amazing experience on this system as well). But the issue with BF3 and Crysis 2 in particular still stands.

Thanks for everyone's input so far :) 
I REALLY appreciate you taking the time to post.
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January 15, 2013 2:14:34 PM

The negative opinions about your CPU are not based on actual benchmarks but simply on the age of the CPU. What people fail to realise is that Intel has made no progress since Nehalem (the original i3/i5/i7 lineup) in gaming. Your i5 760 was every bit as good at gaming as the i7 920, 950 etc. Which in turn gamed just as well as the i5 2000s and i7 2000s. Which in turn are almost identical to the i5 3000s and i7 3000s. Progress made has been in non-gaming performance (moderate) and integrated graphics performance (high).

The fact that your CPU isn't solidly at 100% usage would strongly suggest you're not being limited by it. Keep in mind of course that you may need a new CPU anyway if you get a new motherboard. Depends obviously on whether or not you can find an old 1156 board with what you want. The fact that you get improved performance in some cases though suggests your hardware is working correctly. You're on the 310.90 drivers?
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January 15, 2013 2:26:06 PM

Thanks for expanding on that sam_p_lay. Yes I am on the 310.90 drivers. Also I just noticed that in menus and between servers on both far cry 3 and Battlefield 3, GPU usage goes up to about 60-75% and as soon as I'm in game, BF3 drops back to 40-50. Far Cry is slightly better -I was playing heaps of the Co-Op tonight and it seemed to sit around 65% usage on both GPUs.
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January 15, 2013 3:06:39 PM

do nvidia do seperate game profiles or do they still bundle them with the drivers?
im pretty much in agreement with sam. the i5 should have enough bandwidth. you can check the pci-e by limiting the x16 to x4 (some bios's allow it) and see if you get the same issue.
my guess is that the hypersli is unstable on your motherboard and basically turning off 1 of the cards. also try turning off physx so it doesnt try to use 1 card as a physx card only.
as for setting the performance to extreme it will make little difference over standard. standard just brings stability when you oc.
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January 15, 2013 3:21:11 PM

HEXiT said:
do nvidia do seperate game profiles or do they still bundle them with the drivers?
im pretty much in agreement with sam. the i5 should have enough bandwidth. you can check the pci-e by limiting the x16 to x4 (some bios's allow it) and see if you get the same issue.
my guess is that the hypersli is unstable on your motherboard and basically turning off 1 of the cards. also try turning off physx so it doesnt try to use 1 card as a physx card only.
as for setting the performance to extreme it will make little difference over standard. standard just brings stability when you oc.


I wonder if sli profiles work for me -a lot of my games are on steam and I wonder if selecting the .exe registers properly with it. I still don't understand the concept of 'sli profiles' -all the settings on all the games appear to be on default within each game profile and I don't see what it actually does for the games.

Also -I've benchmarked each card individually within its respective slot:
16x Gpu 1 :p 8373
4x Gpu 2: P7966

Moreover -it appears this setting has somewhat of an impact on benchmark scores:

Standard: P11096
Turbo: P11164 (default setting in BIOS)
Extreme: P11214

And after disabling USB 3.0 and SATA 6 I obtained: P11223.

As for tuning off 1 of the cards -both cards appear to be recieving HALF normal utilization (I monitor it in realtime using readings to my logitech G15 screen during games from EVGA precision X). But for argument's sake I will give disabling PhysX a go and return with my findings. Cheers
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January 15, 2013 3:29:48 PM

disabling physx will force the system to use the 2 cards and not set 1 as the physx card which can sometimes happen with apps like hypersli if the game isnt fully supported or the drivers have issues. its worth checking just to rule it out.
as for the cards i ment test them both together with both pci-e slots being set to x4 some bios will allow you to change the bios from 16-8-4-1 so setting both to x4 will illiminate any disparity in the timings. again its just a test to see if it has any bearing on perfomance over all.
reason being if you loose 5% by dropping the timings but gain 50% performance over because the second card starts working as it should it may be worth limiting both pci-e slots to geth the bigger performance gains.
its a guess but it may solve it...
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January 15, 2013 3:32:26 PM

Hey, I've tried setting PhysX to CPU and it had no effect in my plight. Which makes sense as BF3 and Crysis 2 are not PhysX enabled games any how.

Let me just figure out to how to limit the 16x slot to 4x -I'm not sure I fully understand why you want me to look into it, but I'll do it anyway (if my BIOS allows it). We've already established the 5% difference between the 16x and 4x slot. I can only imagine it worsening performance.

Again HyperSLI is the weak link in the chain so who knows -but sam_p_lay did acknowledge that the hardware is fine.

BTW it seems even Metro 2033 is only using up to 75% of the GPUs but somehow is clearly better in SLI than with a single card.
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January 15, 2013 3:46:20 PM

Hey Hexit. Just did a browse of the Bios and I couldn't locate the option to lower the PCI Bus speed -its a gigabyte Mobo for anyone who might have a clue on how to change this. Your explainations about PhysX not playing nice with hyperSLI and uneven Bus speeds are insightful theories. I appreicate them. I really would like to know how I can clock down the 16x slot in my BIOS :( 
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January 15, 2013 7:22:30 PM

I think it is suprising how many games don't utilize SLI. I mean automatically at least. I mean two 680s in SLI costs almost as much as a 690, why not just get one of those? I really like 1 card setups, less power consumption and just more compatible with everything.

Nvidia's website has some how-to's on SLI, not only how to properly install them, but how to properly enable in-game settings and settings within the control panel itself.
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January 15, 2013 11:50:41 PM

I'm not about to pawn my two gtx680s for a 690. I can only imagine I'd loose money doing that. While it may have been a better option to start with, that doesn't really help me now.

I didn't find anything of use on nvidia's site but perhaps I didn't know where to look. Linky?
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January 16, 2013 3:13:28 AM

nhancer works well but can be dangerous to people who arnt careful.
just stick with the basics till you understand what it can do.
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January 16, 2013 5:09:44 AM

I have no idea what I'm doing or whether it can help me. Should I just delete it or can it be of some use to me here?
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January 16, 2013 9:19:01 AM

it may be of use to you. but make sure you read the help files as your checking on whether certain features may help or not.
it can force sli and force sli with compatibility options so yeah it may help you.
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January 16, 2013 9:49:26 AM

It's very dated software. I would question it's use. Is it the kind of thing I'd want to use after REMOVING hypersli?
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January 16, 2013 9:50:20 AM

Also I'm open to some completely differrent suggestions. The hardware is capable but it's just not doing what it's meant to :( 

It's really frustrating when you spend another $550 and get barely any improvement.
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January 16, 2013 10:01:32 AM

Come one guys, a pair of GTX680s on a 650W power supply? I don't think so. They're throttling back because they're not getting enough power. I had similar on one of my rigs. I was powering a pair of GTX580s with a 850W supply and it was underperforming because of the voltage droop. Once I had upgraded the power supply I was a happy bunny again.
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January 16, 2013 10:10:44 AM

GTX680 has a TDP of 195 watts. 390 watts for two. Of course they may exceed TDP at heavy load, but not by as much as you're talking about. Even at 450 watts, 200 watts is left over for the rest of the system, the highest consumption component of which is a 95W CPU.
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January 16, 2013 10:17:08 AM

Yeah according to the reading I've done, my system is sufficiently powered -not quite running at best efficiency but certainly sufficiently powered. As far as I've known PSU doesn't affect performance -it will either work or it won't.

Paul; Do you have any research, resources or before and after benchmarks with your case to suggest the cards will scale the throttle according to PSU?
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January 16, 2013 10:18:34 AM

remove hypersli. its of no use to you its for sli'ing different cards and yours are the same. you can sli 2 680's as long as the the same gpu, they can be different brands and they will work together as if you bought a matching pair. so its not needed.
yes nhancer is old software but it runs off the drivers so as long as your drivers are up to date the software will still work as it should.
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January 16, 2013 10:24:03 AM

The reason I use hypersli is because I have a 16x and 4x PCI slots. Until installing hypersli I couldn't get NVCP to give me the "Enable Sli" option. I believe it's because my mother board is not supported. Is there a better method to achieve this?

Also; how do I remove hypersli?
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January 16, 2013 11:43:28 AM

The best I can give you is the experience I had with my dual GTX580s. I occasionally benchmarks my systems to see how they performing and if they're performing the same as, or better than, they used to.

Spec - click link, it's the top machine, the one with the i7-3930K. It used to be powered by a Cooler Master Silent Pro 850W. I know, I found out the the hard way they're not that great.

When I first built my i7-3930K/dual GTX580 it would give me benchamrks of around P12400 but would drop to P10400 on subsequent tests, sometimes it would test to P10400 and wouldn't get any higher.

Went to a LAN party, the machine bugged out big big time with crashes all over the place. Someone had suggested the power supply. I installed CPUID HWmonitor. It showed me that my +12V supply dropped below 11.6V (unstable) and as low as 11.4V (system crash).

I upgraded the power supply to the Antec 1200W HCP (I know it's overkill). The benchmark results rose to P12400 and have stayed/risen since with driver updates. My +12V supply hasn't dropped below 11.8V since.

I cannot give you links for the poor performance but here's one for after the fix
http://www.3dmark.com/3dm11/2878520

I suppose the recommendation from this is to install a couple of tools, namely CPUID HWmonitor and EVGA precision. HWmonitor will tell you how your supply voltages are faring whilst EVGA precision will tell you your GPU utilisation. Of course these tools are only useful if you use a couple of stress test tools at the same time, prime95 and furmark are good ones.
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January 16, 2013 11:46:03 AM

I'll check out HWmonitor -I'm already running Precision with read outs to my LCD screen on my keyboard. That's how I know about this issue.
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January 16, 2013 2:35:12 PM

These were my findings -and I have no idea what they mean....

CPUID HWMonitor Report
-------------------------------------------------------------------------

Binaries
-------------------------------------------------------------------------

HWMonitor version 1.2.1.0

Monitoring
-------------------------------------------------------------------------

Mainboard Model P55A-UD3 (0x000001F4 - 0x00A86A2E)

LPCIO
-------------------------------------------------------------------------

LPCIO Vendor ITE
LPCIO Model IT8720
LPCIO Vendor ID 0x90
LPCIO Chip ID 0x8720
LPCIO Revision ID 0x8
Config Mode I/O address 0x2E
Config Mode LDN 0x4
Config Mode registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 00
10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20 87 20 08 00 00 00 FF 1D 40 08 00 00 01 00 00 00
30 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 02 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 02 00 00 04 04 00 00 00 00 00 00 00 00 00 00
Register space LPC, base address = 0x0290


Hardware Monitors
-------------------------------------------------------------------------

Hardware monitor ITE IT87
Voltage 0 0.85 Volts [0x35] (CPU VCORE)
Voltage 1 1.57 Volts [0x62] (VIN1)
Voltage 2 3.41 Volts [0xD5] (+3.3V)
Voltage 3 5.03 Volts [0xBB] (+5V)
Voltage 4 0.70 Volts [0xB] (+12V)
Voltage 5 -12.29 Volts [0xC0] (-12V)
Voltage 7 3.60 Volts [0x86] (+5V VCCH)
Voltage 8 3.23 Volts [0xCA] (VBAT)
Temperature 0 43°C (109°F) [0x2B] (TMPIN0)
Temperature 1 25°C (77°F) [0x19] (TMPIN1)
Temperature 2 31°C (87°F) [0x1F] (TMPIN2)
Fan 0 1452 RPM [0x1D1] (FANIN0)
Fan 2 2184 RPM [0x135] (FANIN2)
Fan PWM 0 0 pc [0x0] (FANPWM0)
Fan PWM 1 0 pc [0x0] (FANPWM1)
Fan PWM 2 0 pc [0x0] (FANPWM2)
Register space LPC, base address = 0x0290

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 13 10 00 00 FF BF 00 37 FF 87 60 0F 17 D1 FF 35
10 FF FF FF 76 D7 82 80 82 01 FF 01 FF FF FF FF FF
20 35 62 D5 BB 11 C0 01 86 CA 2B 19 1F 80 A7 66 66
30 FF 00 FF 00 FF 00 FF 00 FF 00 FF 00 36 00 FF 00
40 7F 7F 7F 7F 7F 7F 5F 74 2D 40 95 00 FF FF FF FF
50 FF 38 7F 7F 7F D0 59 59 90 59 00 12 60 00 00 00
60 00 0A 37 23 90 03 00 FF 00 14 41 23 90 03 00 FF
70 00 0A 37 23 90 03 00 FF FF FF FF FF FF FF FF FF
80 FF FF 00 00 FF FF 00 00 02 30 01 02 01 00 20 BE
90 FF 00 00 00 FF 00 00 00 FF FF FF FF FF FF FF FF
A0 C6 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
B0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
C0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
D0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
E0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
F0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Hardware monitor Gigabyte DES
Voltage 0 0.86 Volts [0x36] (CPU)
Current 0 2.63 Amps [0x1] (CPU)
Power 0 2.27 W (CPU)
Register space LPC, base address = 0x0290

Hardware monitor NVIDIA NVAPI
Voltage 0 0.99 Volts [0x3DB] (VIN0)
Temperature 0 42°C (107°F) [0x2A] (TMPIN0)
Fan 0 990 RPM [0x3DE] (FANIN0)
Fan PWM 0 30 pc [0x1E] (FANPWMIN0)

Hardware monitor NVIDIA NVAPI
Voltage 0 0.99 Volts [0x3DB] (VIN0)
Temperature 0 35°C (95°F) [0x23] (TMPIN0)
Fan 0 1050 RPM [0x41A] (FANIN0)
Fan PWM 0 30 pc [0x1E] (FANPWMIN0)


Processors
-------------------------------------------------------------------------

Number of processors 1
Number of threads 4

APICs
-------------------------------------------------------------------------

Processor 0
-- Core 0
-- Thread 0 0
-- Core 1
-- Thread 0 2
-- Core 2
-- Thread 0 4
-- Core 3
-- Thread 0 6

Timers
-------------------------------------------------------------------------

ACPI timer 3.580 MHz
HPET timer 14.318 MHz
Perf timer 2.732 MHz
Sys timer 1.000 KHz


Processors Information
-------------------------------------------------------------------------

Processor 1 ID = 0
Number of cores 4 (max 8)
Number of threads 4 (max 16)
Name Intel Core i5 760
Codename Lynnfield
Specification Intel(R) Core(TM) i5 CPU 760 @ 2.80GHz
Package (platform ID) Socket 1156 LGA (0x1)
CPUID 6.E.5
Extended CPUID 6.1E
Core Stepping B1
Technology 45 nm
TDP Limit 95 Watts
Core Speed 1199.2 MHz
Multiplier x FSB 9.0 x 133.2 MHz
Rated Bus speed 2398.4 MHz
Stock frequency 2800 MHz
Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, EM64T, VT-x
L1 Data cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
L1 Instruction cache 4 x 32 KBytes, 4-way set associative, 64-byte line size
L2 cache 4 x 256 KBytes, 8-way set associative, 64-byte line size
L3 cache 8 MBytes, 16-way set associative, 64-byte line size
FID/VID Control yes


Turbo Mode supported, enabled
Max turbo frequency 3333 MHz
Max non-turbo ratio 21x
Max turbo ratio 25x
Max efficiency ratio 9x
TDC Limit 89 Amps
Core TDP 89 Watts
Uncore TDP 6 Watts
Power @ 9x 13 Watts
Power @ 10x 15 Watts
Power @ 11x 18 Watts
Power @ 12x 22 Watts
Power @ 13x 27 Watts
Power @ 14x 32 Watts
Power @ 15x 38 Watts
Power @ 16x 45 Watts
Power @ 17x 53 Watts
Power @ 18x 62 Watts
Power @ 19x 71 Watts
Power @ 20x 82 Watts
Power @ 21x 95 Watts
Max bus number 63
Attached device PCI device at bus 63, device 2, function 1
Attached device PCI device at bus 63, device 3, function 4
Attached device PCI device at bus 63, device 2, function 1


Thread dumps
-------------------------------------------------------------------------

CPU Thread 0
APIC ID 0
Topology Processor ID 0, Core ID 0, Thread ID 0
Type 01020005h
Max CPUID level 0000000Bh
Max CPUID ext. level 80000008h
Cache descriptor Level 1, D, 32 KB, 2 thread(s)
Cache descriptor Level 1, I, 32 KB, 2 thread(s)
Cache descriptor Level 2, U, 256 KB, 2 thread(s)
Cache descriptor Level 3, U, 8 MB, 16 thread(s)

CPUID
0x00000000 0x0000000B 0x756E6547 0x6C65746E 0x49656E69
0x00000001 0x000106E5 0x00100800 0x0098E3FD 0xBFEBFBFF
0x00000002 0x55035A01 0x00F0B0E4 0x00000000 0x09CA212C
0x00000003 0x00000000 0x00000000 0x00000000 0x00000000
0x00000004 0x1C004121 0x01C0003F 0x0000003F 0x00000000
0x00000004 0x1C004122 0x00C0003F 0x0000007F 0x00000000
0x00000004 0x1C004143 0x01C0003F 0x000001FF 0x00000000
0x00000004 0x1C03C163 0x03C0003F 0x00001FFF 0x00000002
0x00000005 0x00000040 0x00000040 0x00000003 0x00001120
0x00000006 0x00000003 0x00000002 0x00000001 0x00000000
0x00000007 0x00000000 0x00000000 0x00000000 0x00000000
0x00000008 0x00000000 0x00000000 0x00000000 0x00000000
0x00000009 0x00000000 0x00000000 0x00000000 0x00000000
0x0000000A 0x07300403 0x00000044 0x00000000 0x00000603
0x0000000B 0x00000001 0x00000001 0x00000100 0x00000000
0x0000000B 0x00000004 0x00000004 0x00000201 0x00000000
0x80000000 0x80000008 0x00000000 0x00000000 0x00000000
0x80000001 0x00000000 0x00000000 0x00000001 0x28100800
0x80000002 0x65746E49 0x2952286C 0x726F4320 0x4D542865
0x80000003 0x35692029 0x55504320 0x20202020 0x20202020
0x80000004 0x30363720 0x20402020 0x30382E32 0x007A4847
0x80000005 0x00000000 0x00000000 0x00000000 0x00000000
0x80000006 0x00000000 0x00000000 0x01006040 0x00000000
0x80000007 0x00000000 0x00000000 0x00000000 0x00000100
0x80000008 0x00003024 0x00000000 0x00000000 0x00000000

MSR 0x0000001B 0x00000000 0xFEE00900
MSR 0x0000003A 0x00000000 0x00000005
MSR 0x000001A0 0x00000000 0x00850089
MSR 0x000000CE 0x00000900 0x40031500
MSR 0x00000017 0x00040000 0x00000000
MSR 0x00000035 0x00000000 0x00040004
MSR 0x000000C1 0x00000000 0x00000000
MSR 0x000000C2 0x00000000 0x00000000
MSR 0x000000C3 0x00000000 0x00000000
MSR 0x000000C4 0x00000000 0x00000000
MSR 0x00000186 0x00000000 0x00000000
MSR 0x00000187 0x00000000 0x00000000
MSR 0x000001AD 0x00000000 0x16161919
MSR 0x0000019A 0x00000000 0x00000000
MSR 0x000001A4 0x00000000 0x00000000
MSR 0x000001AC 0x00000000 0x02C802F8
MSR 0x000001FC 0x00000000 0x00000001
MSR 0x00000300 0x00000000 0xF000000D
MSR 0x0000019C 0x00000000 0x88380000
MSR 0x000001A2 0x00000000 0x00631000
MSR 0xC0000103 0x00000000 0x00000000
MSR 0x00000198 0x00000000 0x00000009
MSR 0x00000199 0x00000000 0x00000009

CPU Thread 1
APIC ID 2
Topology Processor ID 0, Core ID 1, Thread ID 0
Type 01020005h
Max CPUID level 0000000Bh
Max CPUID ext. level 80000008h
Cache descriptor Level 1, D, 32 KB, 2 thread(s)
Cache descriptor Level 1, I, 32 KB, 2 thread(s)
Cache descriptor Level 2, U, 256 KB, 2 thread(s)
Cache descriptor Level 3, U, 8 MB, 16 thread(s)

CPUID
0x00000000 0x0000000B 0x756E6547 0x6C65746E 0x49656E69
0x00000001 0x000106E5 0x02100800 0x0098E3FD 0xBFEBFBFF
0x00000002 0x55035A01 0x00F0B0E4 0x00000000 0x09CA212C
0x00000003 0x00000000 0x00000000 0x00000000 0x00000000
0x00000004 0x1C004121 0x01C0003F 0x0000003F 0x00000000
0x00000004 0x1C004122 0x00C0003F 0x0000007F 0x00000000
0x00000004 0x1C004143 0x01C0003F 0x000001FF 0x00000000
0x00000004 0x1C03C163 0x03C0003F 0x00001FFF 0x00000002
0x00000005 0x00000040 0x00000040 0x00000003 0x00001120
0x00000006 0x00000003 0x00000002 0x00000001 0x00000000
0x00000007 0x00000000 0x00000000 0x00000000 0x00000000
0x00000008 0x00000000 0x00000000 0x00000000 0x00000000
0x00000009 0x00000000 0x00000000 0x00000000 0x00000000
0x0000000A 0x07300403 0x00000044 0x00000000 0x00000603
0x0000000B 0x00000001 0x00000001 0x00000100 0x00000002
0x0000000B 0x00000004 0x00000004 0x00000201 0x00000002
0x80000000 0x80000008 0x00000000 0x00000000 0x00000000
0x80000001 0x00000000 0x00000000 0x00000001 0x28100800
0x80000002 0x65746E49 0x2952286C 0x726F4320 0x4D542865
0x80000003 0x35692029 0x55504320 0x20202020 0x20202020
0x80000004 0x30363720 0x20402020 0x30382E32 0x007A4847
0x80000005 0x00000000 0x00000000 0x00000000 0x00000000
0x80000006 0x00000000 0x00000000 0x01006040 0x00000000
0x80000007 0x00000000 0x00000000 0x00000000 0x00000100
0x80000008 0x00003024 0x00000000 0x00000000 0x00000000

MSR 0x0000001B 0x00000000 0xFEE00800
MSR 0x0000003A 0x00000000 0x00000005
MSR 0x000001A0 0x00000000 0x00850089
MSR 0x000000CE 0x00000900 0x40031500
MSR 0x00000017 0x00040000 0x00000000
MSR 0x00000035 0x00000000 0x00040004
MSR 0x000000C1 0x00000000 0x00000000
MSR 0x000000C2 0x00000000 0x00000000
MSR 0x000000C3 0x00000000 0x00000000
MSR 0x000000C4 0x00000000 0x00000000
MSR 0x00000186 0x00000000 0x00000000
MSR 0x00000187 0x00000000 0x00000000
MSR 0x000001AD 0x00000000 0x16161919
MSR 0x0000019A 0x00000000 0x00000000
MSR 0x000001A4 0x00000000 0x00000000
MSR 0x000001AC 0x00000000 0x02C802F8
MSR 0x000001FC 0x00000000 0x00000001
MSR 0x00000300 0x00000000 0xF000000D
MSR 0x0000019C 0x00000000 0x883A0000
MSR 0x000001A2 0x00000000 0x00631000
MSR 0xC0000103 0x00000000 0x00000000
MSR 0x00000198 0x00000000 0x00000009
MSR 0x00000199 0x00000000 0x00000009

CPU Thread 2
APIC ID 4
Topology Processor ID 0, Core ID 2, Thread ID 0
Type 01020005h
Max CPUID level 0000000Bh
Max CPUID ext. level 80000008h
Cache descriptor Level 1, D, 32 KB, 2 thread(s)
Cache descriptor Level 1, I, 32 KB, 2 thread(s)
Cache descriptor Level 2, U, 256 KB, 2 thread(s)
Cache descriptor Level 3, U, 8 MB, 16 thread(s)

CPUID
0x00000000 0x0000000B 0x756E6547 0x6C65746E 0x49656E69
0x00000001 0x000106E5 0x04100800 0x0098E3FD 0xBFEBFBFF
0x00000002 0x55035A01 0x00F0B0E4 0x00000000 0x09CA212C
0x00000003 0x00000000 0x00000000 0x00000000 0x00000000
0x00000004 0x1C004121 0x01C0003F 0x0000003F 0x00000000
0x00000004 0x1C004122 0x00C0003F 0x0000007F 0x00000000
0x00000004 0x1C004143 0x01C0003F 0x000001FF 0x00000000
0x00000004 0x1C03C163 0x03C0003F 0x00001FFF 0x00000002
0x00000005 0x00000040 0x00000040 0x00000003 0x00001120
0x00000006 0x00000003 0x00000002 0x00000001 0x00000000
0x00000007 0x00000000 0x00000000 0x00000000 0x00000000
0x00000008 0x00000000 0x00000000 0x00000000 0x00000000
0x00000009 0x00000000 0x00000000 0x00000000 0x00000000
0x0000000A 0x07300403 0x00000044 0x00000000 0x00000603
0x0000000B 0x00000001 0x00000001 0x00000100 0x00000004
0x0000000B 0x00000004 0x00000004 0x00000201 0x00000004
0x80000000 0x80000008 0x00000000 0x00000000 0x00000000
0x80000001 0x00000000 0x00000000 0x00000001 0x28100800
0x80000002 0x65746E49 0x2952286C 0x726F4320 0x4D542865
0x80000003 0x35692029 0x55504320 0x20202020 0x20202020
0x80000004 0x30363720 0x20402020 0x30382E32 0x007A4847
0x80000005 0x00000000 0x00000000 0x00000000 0x00000000
0x80000006 0x00000000 0x00000000 0x01006040 0x00000000
0x80000007 0x00000000 0x00000000 0x00000000 0x00000100
0x80000008 0x00003024 0x00000000 0x00000000 0x00000000

MSR 0x0000001B 0x00000000 0xFEE00800
MSR 0x0000003A 0x00000000 0x00000005
MSR 0x000001A0 0x00000000 0x00850089
MSR 0x000000CE 0x00000900 0x40031500
MSR 0x00000017 0x00040000 0x00000000
MSR 0x00000035 0x00000000 0x00040004
MSR 0x000000C1 0x00000000 0x00000000
MSR 0x000000C2 0x00000000 0x00000000
MSR 0x000000C3 0x00000000 0x00000000
MSR 0x000000C4 0x00000000 0x00000000
MSR 0x00000186 0x00000000 0x00000000
MSR 0x00000187 0x00000000 0x00000000
MSR 0x000001AD 0x00000000 0x16161919
MSR 0x0000019A 0x00000000 0x00000000
MSR 0x000001A4 0x00000000 0x00000000
MSR 0x000001AC 0x00000000 0x02C802F8
MSR 0x000001FC 0x00000000 0x00000001
MSR 0x00000300 0x00000000 0xF000000D
MSR 0x0000019C 0x00000000 0x88390000
MSR 0x000001A2 0x00000000 0x00631000
MSR 0xC0000103 0x00000000 0x00000000
MSR 0x00000198 0x00000000 0x00000009
MSR 0x00000199 0x00000000 0x00000009

CPU Thread 3
APIC ID 6
Topology Processor ID 0, Core ID 3, Thread ID 0
Type 01020005h
Max CPUID level 0000000Bh
Max CPUID ext. level 80000008h
Cache descriptor Level 1, D, 32 KB, 2 thread(s)
Cache descriptor Level 1, I, 32 KB, 2 thread(s)
Cache descriptor Level 2, U, 256 KB, 2 thread(s)
Cache descriptor Level 3, U, 8 MB, 16 thread(s)

CPUID
0x00000000 0x0000000B 0x756E6547 0x6C65746E 0x49656E69
0x00000001 0x000106E5 0x06100800 0x0098E3FD 0xBFEBFBFF
0x00000002 0x55035A01 0x00F0B0E4 0x00000000 0x09CA212C
0x00000003 0x00000000 0x00000000 0x00000000 0x00000000
0x00000004 0x1C004121 0x01C0003F 0x0000003F 0x00000000
0x00000004 0x1C004122 0x00C0003F 0x0000007F 0x00000000
0x00000004 0x1C004143 0x01C0003F 0x000001FF 0x00000000
0x00000004 0x1C03C163 0x03C0003F 0x00001FFF 0x00000002
0x00000005 0x00000040 0x00000040 0x00000003 0x00001120
0x00000006 0x00000003 0x00000002 0x00000001 0x00000000
0x00000007 0x00000000 0x00000000 0x00000000 0x00000000
0x00000008 0x00000000 0x00000000 0x00000000 0x00000000
0x00000009 0x00000000 0x00000000 0x00000000 0x00000000
0x0000000A 0x07300403 0x00000044 0x00000000 0x00000603
0x0000000B 0x00000001 0x00000001 0x00000100 0x00000006
0x0000000B 0x00000004 0x00000004 0x00000201 0x00000006
0x80000000 0x80000008 0x00000000 0x00000000 0x00000000
0x80000001 0x00000000 0x00000000 0x00000001 0x28100800
0x80000002 0x65746E49 0x2952286C 0x726F4320 0x4D542865
0x80000003 0x35692029 0x55504320 0x20202020 0x20202020
0x80000004 0x30363720 0x20402020 0x30382E32 0x007A4847
0x80000005 0x00000000 0x00000000 0x00000000 0x00000000
0x80000006 0x00000000 0x00000000 0x01006040 0x00000000
0x80000007 0x00000000 0x00000000 0x00000000 0x00000100
0x80000008 0x00003024 0x00000000 0x00000000 0x00000000

MSR 0x0000001B 0x00000000 0xFEE00800
MSR 0x0000003A 0x00000000 0x00000005
MSR 0x000001A0 0x00000000 0x00850089
MSR 0x000000CE 0x00000900 0x40031500
MSR 0x00000017 0x00040000 0x00000000
MSR 0x00000035 0x00000000 0x00040004
MSR 0x000000C1 0x00000000 0x00000000
MSR 0x000000C2 0x00000000 0x00000000
MSR 0x000000C3 0x00000000 0x00000000
MSR 0x000000C4 0x00000000 0x00000000
MSR 0x00000186 0x00000000 0x00000000
MSR 0x00000187 0x00000000 0x00000000
MSR 0x000001AD 0x00000000 0x16161919
MSR 0x0000019A 0x00000000 0x00000000
MSR 0x000001A4 0x00000000 0x00000000
MSR 0x000001AC 0x00000000 0x02C802F8
MSR 0x000001FC 0x00000000 0x00000001
MSR 0x00000300 0x00000000 0xF000000D
MSR 0x0000019C 0x00000000 0x883A0000
MSR 0x000001A2 0x00000000 0x00631000
MSR 0xC0000103 0x00000000 0x00000000
MSR 0x00000198 0x00000000 0x00000009
MSR 0x00000199 0x00000000 0x00000009



Storage
-------------------------------------------------------------------------

USB Device Logitech USB Optical Wheel Mouse, class=0x00, subclass=0x00, vendor=0x046D, product=0xC016
USB Device Logitech Cordless USB Mouse, class=0x00, subclass=0x00, vendor=0x046D, product=0xC50E
USB Device Generic USB Hub, class=0x09, subclass=0x00, vendor=0x046D, product=0xC223
USB Device USB Composite Device, class=0x00, subclass=0x00, vendor=0x046D, product=0xC221
USB Device USB Input Device, class=0x00, subclass=0x00, vendor=0x046D, product=0xC222

Graphic APIs
-------------------------------------------------------------------------

API NVIDIA I/O
API NVIDIA NVAPI

Display Adapters
-------------------------------------------------------------------------

Display adapter 0
Name NVIDIA GeForce GTX 680
Revision A2
Codename GK104
Technology 28 nm
PCI device bus 1 (0x1), device 0 (0x0), function 0 (0x0)
Vendor ID 0x10DE (0x3842)
Model ID 0x1180 (0x2683)

Display adapter 1
Name NVIDIA GeForce GTX 680
Revision A2
Codename GK104
Technology 28 nm
PCI device bus 4 (0x4), device 0 (0x0), function 0 (0x0)
Vendor ID 0x10DE (0x3842)
Model ID 0x1180 (0x2683)


ACPI
-------------------------------------------------------------------------

ACPI Tree
_GPE
_L08
_L03
_L04
_L0C
_L0E
_L05
_L20
_L25
_L0D
_L0B
_L09
_PR_
CPU0
TYPE
PSEN
CSEN
MWOS
TSEN
_PDC
_OSC
_PSS
_PCT
_PPC
_PSD
_CST
_TPC
_PTC
_TSS
_TSD
CPU1
TYPE
PSEN
CSEN
MWOS
TSEN
_PDC
_OSC
_PSS
_PCT
_PPC
_PSD
_CST
_TPC
_PTC
_TSS
_TSD
CPU2
TYPE
PSEN
CSEN
MWOS
TSEN
_PDC
_OSC
_PSS
_PCT
_PPC
_PSD
_CST
_TPC
_PTC
_TSS
_TSD
CPU3
TYPE
PSEN
CSEN
MWOS
TSEN
_PDC
_OSC
_PSS
_PCT
_PPC
_PSD
_CST
_TPC
_PTC
_TSS
_TSD
CPU4
CPU5
CPU6
CPU7
_SB_
PWRB
_HID
_STA
PCI0
_HID
_ADR
_UID
_BBN
_S3D
_STA
_CRS
PICM
APIC
_PRT
PEX0
_ADR
_STA
_PRW
PIC0
API0
_PRT
PEX1
_ADR
_STA
_PRW
PIC1
API1
_PRT
PEX2
_ADR
_STA
_PRW
PIC2
API2
_PRT
PEX3
_ADR
_STA
_PRW
PIC3
API3
_PRT
PEX4
_ADR
_STA
_PRW
PIC4
API4
_PRT
PEX5
_ADR
_STA
_PRW
PIC5
API5
_PRT
PEX6
_ADR
_STA
_PRW
PIC6
API6
_PRT
PEX7
_ADR
_STA
_PRW
PIC7
API7
_PRT
HUB0
_ADR
_STA
PICM
APIC
_PRT
_PRW
PX40
_ADR
PREV
PIRQ
PIR2
LPIO
SYSR
_HID
_UID
_CRS
PIC_
_HID
_CRS
DMA1
_HID
_CRS
TMR_
_HID
ATT5
ATT6
_CRS
HPET
_HID
ATT3
ATT4
_STA
_CRS
RTC_
_HID
ATT0
ATT1
ATT2
ATT3
_CRS
SPKR
_HID
_CRS
COPR
_HID
_CRS
FDC0
_HID
_STA
_DIS
_CRS
_PRS
_SRS
UAR1
_HID
_UID
_STA
_DIS
_CRS
_PRS
_SRS
_PRW
_PSW
LPT1
_HID
_STA
_DIS
_CRS
_PRS
_SRS
ECP1
_HID
_STA
_DIS
_CRS
_PRS
_SRS
KBCT
[ ]
P060
[ ]
P064
PS2M
_HID
_STA
_CRS
PS2K
_HID
_STA
_CRS
PSMR
_HID
_UID
_STA
_CRS
PMIO
_HID
_UID
_CRS
_INI
USB0
_ADR
_S3D
_PRW
USB1
_ADR
_S3D
_PRW
USB2
_ADR
_S3D
_PRW
USB3
_ADR
_S3D
_PRW
USB4
_ADR
_S3D
_PRW
USB5
_ADR
_S3D
_PRW
USB6
_ADR
_S3D
_PRW
USBE
_ADR
_S3D
_PRW
USE2
_ADR
_S3D
_PRW
IDE1
_ADR
PCI_
[ ]
ITM0
ITM1
SIT0
SIT1
[ ]
UDC0
UDC1
[ ]
UDT0
UDT1
[ ]
ICF0
ICF1
[ ]
WPPE
[ ]
FAS0
FAS1
PRIM
_ADR
_GTM
_STM
DRV0
_ADR
H15F
_GTF
DRV1
_ADR
H15F
_GTF
SECD
_ADR
_GTM
_STM
DRV0
_ADR
H15F
_GTF
DRV1
_ADR
H15F
_GTF
IDE2
_ADR
PCI_
[ ]
ITM0
ITM1
SIT0
SIT1
[ ]
UDC0
[ ]
UDC1
[ ]
UDT0
UDT1
[ ]
ICF0
ICF1
[ ]
WPPE
[ ]
FAS0
FAS1
PRIM
_ADR
_GTM
_STM
DRV0
_ADR
H15F
_GTF
DRV1
_ADR
H15F
_GTF
SECD
_ADR
_GTM
_STM
DRV0
_ADR
H15F
_GTF
DRV1
_ADR
H15F
_GTF
GTM_
STM_
H15P
GTF0
GTF1
PX43
_ADR
PBAS
[ ]
BAS0
SMBB
AZAL
_ADR
_PRW
BUFA
BUFB
IRQV
LNKA
_HID
_UID
_STA
_PRS
_DIS
_CRS
_SRS
LNKB
_HID
_UID
_STA
_PRS
_DIS
_CRS
_SRS
LNKC
_HID
_UID
_STA
_PRS
_DIS
_CRS
_SRS
LNKD
_HID
_UID
_STA
_PRS
_DIS
_CRS
_SRS
LNKE
_HID
_UID
_STA
_PRS
_DIS
_CRS
_SRS
LNKF
_HID
_UID
_STA
_PRS
_DIS
_CRS
_SRS
LNK0
_HID
_UID
_STA
_PRS
_DIS
_CRS
_SRS
LNK1
_HID
_UID
_STA
_PRS
_DIS
_CRS
_SRS
_PRW
EXPL
_HID
_UID
_CRS
MEM_
_HID
_CRS
FWH_
_HID
_CRS
_SI_
_MSG
_SST
_TZ_
_REV
_OS_
_OSI
_GL_
_S0_
SS1_
_S3_
_S4_
_S5_
FLAG
STAT
SMOD
[ ]
[ ]
SUSF
LBOC
[ ]
UBMC
[ ]
DEBG
[ ]
DBG1
RCRB
[ ]
[ ]
[ ]
HPTF
ELKM
[ ]
[ ]
[ ]
ELSO
[ ]
[ ]
[ ]
[ ]
EXTM
[ ]
ROM1
RMS1
ROM2
RMS2
ROM3
RMS3
AMEM
SMIC
[ ]
SCP_
GP2C
[ ]
G2C1
G2C2
APMP
[ ]
APMC
APMD
AGPS
[ ]
GPSE
GPSS
GPCN
[ ]
[ ]
SWGC
[ ]
OSFX
LINX
AMAC
OSFL
STRC
INFO
[ ]
KBDI
RTCW
PS2F
IRFL
DISE
SSHU
PICF
_PIC
_PTS
_WAK
[ ]
REV0
[ ]
PIRA
PIRB
PIRC
PIRD
[ ]
PIRE
PIRF
PIRG
PIRH
[ ]
UAIO
PRIO
LPE1
LPE2
GN1L
GN1H
GN2L
GN2H
DISD
CKIO
SLDM
SCPP
[ ]
SMIP
OSTP
WIN1
[ ]
INDP
DATP
GPIO
[ ]
GO01
GO02
GO03
GO04
GO05
[ ]
[ ]
CFG_
[ ]
LDN_
[ ]
IDHI
IDLO
POWC
[ ]
ACTR
[ ]
IOAH
IOAL
IO2H
IO2L
[ ]
INTR
[ ]
INT1
[ ]
DMCH
[ ]
GP40
[ ]
OPT1
OPT2
OPT3
OPT4
ENFG
EXFG
GSRG
SSRG

m
0
l
January 16, 2013 3:37:23 PM

Dear Shred_777,

I'd like to help you with what I know from my experience and a lot of research.

You have 2 problems here:

Firstly, You PSU is probably not capable of running the 2 GPUs. If you check this link,(http://www.pccasegear.com/index.php?main_page=product_info&cPath=193_1377&products_id=19988), scroll down to the "requirements' section, you will see that you need a PSU that has current rating of 38 Amps on the 12+ volt rail.
Therefore, 2 GPUs need at least 76 Amps, which means you need a PSU such as this(I'm not advertising it) (http://www.pccasegear.com/index.php?main_page=product_info&cPath=15_535&products_id=19412).It has a table that shows the 12+ volt rail current rating.

Secondly, your CPU frequency is 2.8 Ghz, which sure bottlenecks the 2 GPUs. It just can't catch up with the 2 powerful GPUs. I think you need to overclock your CPU up to at least 3.5 Ghz to see how it goes or you best buy a new CPU and then overclock it up to 4.5 Ghz (I believe this is the optimal option). You will know what i mean via a Linus tech tips video with his good clarification (http://www.youtube.com/watch?v=TGdo75gasaQ). Also, I knew he's right when I maxed out Crysis 2 (my CPU is core i5-3470 @ 3.6 Ghz & GPU is 1 GTX 670). While my FPS varied from 30-50 depending the scenes with high resolution textures & directX 11 and my CPU load was 100%, my GPU load just varied from 50-67%, which didn't reach its full potential.

Hope these will solve your problem. I know how frustrating it is when you can't get the performance you expect.
m
0
l
January 17, 2013 1:17:37 AM

XFX 650W XXX Edition Modular Power Supply, 80+ Bronze Certified, Quiet 135mm Cooling Fan. ATX12V 2.2 / ESP12V 2.91, Main ATX 20+4pin, ATX 4+4pin, EPS12V 8pin, PCIe 6+2pin, SATA 15pin, Peripheral 4pin, FDD 4pin (P1-650X-CAG9)

My PSU
m
0
l
January 17, 2013 1:20:37 AM

http://xfxforce.com/en-gb/Products/Power-Supply/XFX/Pro...

I should have mentioned this before. This is am exceptional power supply and is ideal for SLI (read the link before debating) -but is it enough?

It may be worth doing the reading here and watching the second half of the video there.
m
0
l
January 17, 2013 1:33:11 AM

well I can tell you right now that you have a power bottleneck here is the requirements for power for those cards this is if everything in your system is not over clocked and that doesn't count for watt spikes so you always want to go over the min watt req. you need to fix this first and then after that you can check to see if your CPU may be bottlenecking it some which would be your second most likely reason.

•GeForce GTX 680 - On your average system the card requires you to have a 550 Watt power supply unit.
•GeForce GTX 680 SLI - On your average system the cards require you to have a 750 Watt power supply unit as minimum.
m
0
l
January 17, 2013 1:54:38 AM

That's the recommendation, I'm not sure that is exactly what's happening. No one has been able to give me ANY evidence or research that backs up the idea that the gtx 680s are throttling back their power as a result of poor power. As far as I'm aware they will either work or they won't. Have a read of the thread below:

http://www.overclock.net/t/1332439/gtx-680-sli-psu-advi...

(Btw One of the suggested PSU's are my current one)
m
0
l
January 17, 2013 2:41:43 AM



Thanks! Gee it's nice when opinions are supported :) 

That's not a dig at anyone else's replies here -I'm grateful for everyone's input. It just adds credibility to claims which require me to spend money. I have been looking into this and everything else I've found says that the PSU can't effect GPU. This is the first I hear of it. I've just contacted XFX regarding the potential of my PSU to bottleneck my GPUs. I'm trying to extend my research in any way I can. If anyone else has thoughts or articles/charts/stats/research or links on the matter I'd really value their input.

Thanks again dude!
m
0
l
January 17, 2013 6:15:17 AM

Unfortunately I don't have evidence to back my theory up but since these new GPU's work on a power target setting clocks etc, a low amp rail could effect them.

I have a gtx 670 and the power target never goes over 30% and I'm pretty sure it's down to my crappy OCZ modstream PSU. This has happened with two 670's I've had so it's not a card issue.
m
0
l
January 17, 2013 6:32:50 AM

CPU bottleneck
m
0
l
January 17, 2013 8:29:12 AM

I see only 2 things here:
Either games are not optmized for HyperSLI (as Metro works, means SLI is in fact working), and also CPU wont bottleneck more than 3-4 FPS, unless you are playing a CPU dependand game like Starcraft 2. Hell, im still using my Q6600 at stock speeds with an 560 TI and i play almost every game out there maxed with SweetFX AA.

Second option, lack of Power.
I doubt thats it, but i know i personally always have AT least an extra 200W myself to be on the safe side and never wonrry about it.
m
0
l
January 17, 2013 10:22:41 AM

This was the solution from EVGA:

Your Question:

For some reason my Nvidia control panel doesn't give me the option to enable SLI.

In order to get around this, I'm using an application called HyperSLI:
http://www.techpowerup.com/forums/showpost.php?p=241499...

This gives me the option to enable SLI in the Nvidia control Panel. When using a single GTX 680 (since before installing the second card), I get well above 80% GPU utilization as is indicated by Precision X, when running games like Battlefield 3 and Far Cry 3 as well as Crysis 2. However, upon enabling SLI from the Nvdia Control Panel, GPU usage in menus is in the 70s and 80s (percentage-wise) and yet once I'm in game, usage is in the 40s and 50s. Needless to say this affects my frame rate giving me only a MILD improvement when going froma single card to SLI.

I want to know why my GPU's are witholding their full power. I'm using 310.90 Nvidia drivers.

Also it is worth noting that my current system's hardware is functional as it scores P11223 on 3DMark '11.

Benchmarking each GPU within it's respect PCI-E slot the scores are as follows:

Gpu 1 :p 8373
Gpu 2: P7966

I've paid A LOT of money for these two cards and currently I'm only expereiencing the performance of one. I've asked on forums and have spent HOURS for over a week trying to resolve this issue. PLEASE HELP ME!
Your Answer:

Hi (name removed),

Reviewing your system specs I see that the motherboard (Gigabyte P55A-UD3) does not support SLI and the second PCIe x16 slot is only mechanically x16 and electrical it can only run at x4 speeds. HyperSLI is not supported and not recommended as it is a hack to enable SLI. To run SLI it is also recommended that both cards run in at least x8 speed slots.

Unfortunately due to the lack of SLI support on the board and one of the slots running at x4 speeds we cannot guarantee any performance increase and it will not officially run in SLI. You can use the second card as a PhysX card. To run the cards in SLI you will have to use a motherboard that supports SLI.

Regards,
EVGA


So an ASUS Maximus iii then?
m
0
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January 19, 2013 5:00:23 AM

So I purchased a Silverstone Evolution Gold 1000watt PSU, and I've ordered an Asus Mamimus iii Gene Mobo. Already attached PSU and should have mobo this week. I'm not sure this will fix things but we'll see. Somehow everything just feels smoother and quicker on this new PSU. That shouldn't be but somehow that's how it feels atm.
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January 19, 2013 2:33:51 PM

Could be placebo effect. You know something's changed that *could* affect performance.
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January 19, 2013 3:00:18 PM

Haha I absolutely agree. I'm a sucker for the old placebo. I can confidently say I have less CPU lockups and freezes and crashes. Although since a few days ago (prePsu upgrade and now) I've been getting a freeze at the loading screen at the end of every multiplayer match on Far Cry 3. Doing a quick google it seems to be a common issue. Anyone else experienced this?

Sorry don't mean to get off topic. There isn't much more I can say until I get my mobo. Although EVGA support confirmed with me that GPU usage has NOTHING to do with PSU.
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February 1, 2013 12:59:33 AM

I hope no one kills me for resurrecting this thread.

I know for a fact however that a lot of people have posted everywhere about my exact issue. I simply want to keep this up to date as a reference for anyone experiencing the same issue.

I have recently purchased and installed an Asus mximus Gene III motherboard which is an approved mobo for SLI.

I have removed hyperSLI and have SLI running straight off the bat.

I've seen a 5% improvement across the board in everything including my benchmark.

I've just purchased a Noctua NH-D14, and tonight will install it as well as attempt to overclock to about 4.1Ghz on my i5 760 -which I know is achievable. At least I know I will definitly reach 3.6.

There are theories going around that BF3 and Far Cry 3 are CPU intensive games and bottle necks occur only when the CPU has to work harder -Metro seems to be very much GPU focused -hence the usage is high there as well as in 3D Mark.

My CPU usage as stated earlier came from an inaccurate read out. It would seem after monitoring it in task manager, my CPU usuage in BF3 is quite high.

I will report if I see higher usuage from my GPUs after tonight's overclock.

This will confirm ONCE AND FOR ALL if the low usage in BF3 and some of these other games is due to a CPU bottle neck.
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