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cpu bottleneck? (i7 3770k @4.5hz gtx 680 sli)

Tags:
  • Intel i7
  • CPUs
  • SLI
  • Gtx
  • Bottleneck
Last response: in CPUs
July 14, 2013 7:24:29 PM

I recently got my second gtx 680. The issue is that im only seeing like 50-65 percent usage on both cards. My processor is overclocked to 4.5 so I don't believe i should be seeing these bottlenecks. When I run a game im only seeing about 20% cpu usage for some reason as well. I can run prime 95 stable and temps dont exceed 70c. Can anyone offer insight to why my gpu usage is so low and how to fix this? I've pretty much tried everything i can think of :( 

More about : cpu bottleneck 3770k 5hz gtx 680 sli

a c 1107 à CPUs
July 14, 2013 7:37:08 PM

If the low usage is with games that aren't graphically demanding, it simply means the cards are not needing to run full out. The CPU should be perfect for those cards.
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a b à CPUs
July 14, 2013 7:38:27 PM

No, even the 3570k are perfectly fine.
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July 14, 2013 7:38:38 PM

its with all games, including benchmarks. on unigine heaven extreme preset im getting like 20 fps with 10 percent cpu usage. could this be a power supply issue? if i hook up only one card i experience 99 percent usage. its only with two cards that i experience 60% usage.
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July 14, 2013 7:39:09 PM

fyi i have a corsair cx 750 which i thought would be more than sufficient.
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a c 1107 à CPUs
July 14, 2013 7:48:53 PM

The 750W PSU is sufficient, but not "more than sufficient". I didn't even think that PSU had 4 PCIe connectors.
The system in my sig gets 20 min/43 avg /64 max FPS in Heaven for comparison.
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July 14, 2013 8:13:15 PM

it does have 4 pci e ports. ive tried every configuration. the only way that i can get 99 percent usage is with one card.
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a b à CPUs
July 14, 2013 8:14:36 PM

Intel chips dont bottleneck video cards. Bloomfield, Lynnfield, Sandy bridge, Ivy bridge, Haswell can easily push 2 video cards even Titans and OP 99% across 2 cards wont happen unless you clock it over 5Ghz+
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July 14, 2013 8:18:49 PM

I didn't think so. I'm beginning to think this has to be a power issue. my pc has no problem pushing 1 card to max. even if i have sli disabled and just have the other graphics card plugged in i still dont get 100 percent usage on the single card. does anyone else have any more insight on the power issue? is this a common problem associated with insufficient power?
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a c 1107 à CPUs
July 14, 2013 8:19:50 PM

Does your frame rate change in Heaven with one card? I presume you've enabled SLI in the NVCP.
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July 14, 2013 8:20:56 PM

also when i have my 2nd graphics card installed and powered my monitor usually has issues as well. with a single graphics card i can acheive 120hz but with both i can only get 90hz and it wont let me use my other monitor. it begins "sticking" when i open programs or play games.
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July 14, 2013 8:21:42 PM

yeah it definitely changes. i am getting SOME performance out of both cards. but the usage is about 40-60 on both cards.

edit: just additional information: i am running 8x/8x and my motherboard is the asus p8z77 v lk. I do understand that i will nto be able to acheive 99 percent on both cards however i assumed the scaling would be better than 60-70 percent usage.
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a b à CPUs
July 14, 2013 8:29:58 PM

adam_1343 said:
yeah it definitely changes. i am getting SOME performance out of both cards. but the usage is about 40-60 on both cards.

edit: just additional information: i am running 8x/8x and my motherboard is the asus p8z77 v lk. I do understand that i will nto be able to acheive 99 percent on both cards however i assumed the scaling would be better than 60-70 percent usage.


Its more about the drivers then the cpu pushing them. I cant achieve 99% across both cards with my 760's in BF3 but that's just the way it goes.
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a c 1107 à CPUs
July 14, 2013 8:35:07 PM

Intel God said:
adam_1343 said:
yeah it definitely changes. i am getting SOME performance out of both cards. but the usage is about 40-60 on both cards.

edit: just additional information: i am running 8x/8x and my motherboard is the asus p8z77 v lk. I do understand that i will nto be able to acheive 99 percent on both cards however i assumed the scaling would be better than 60-70 percent usage.


Its more about the drivers then the cpu pushing them. I cant achieve 99% across both cards with my 760's in BF3 but that's just the way it goes.


But something must be wrong if he is only getting 20 FPS in Heaven.

@OP
what settings were you using in Heaven?
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July 14, 2013 8:35:09 PM

i understand. however i was looking at some benches of metro last light. my average frame rate with the same rez/settings is exactly about half of what the benches are getting. I know understand that its not my cpu bottlenecking them however, i dont know how i can make hte usage go up... it stays at abour 40-55 percent.... what else could be bottlenecking my system?
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a c 1107 à CPUs
July 14, 2013 8:36:18 PM

You've got me leaning towards the PSU being the issue, now.
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July 14, 2013 8:41:35 PM

in heaven i am using the extreme preset. its the basic edition so its only whatever the default resolution. on metro ll. the benchmark im comparing is set at :1920x1200. everything on very high except SSAA . based on this benchmark

http://www.game-debate.com/news/?news=5767&game=Metro:%...

i should be getting around 100+ fps however my avg fps its 68.98
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a b à CPUs
July 14, 2013 8:43:15 PM

This setting changed?

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July 14, 2013 8:47:13 PM

yes it is on "prefer maximum performance" still only 40-60 percent usage.
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July 14, 2013 9:07:13 PM

I'm still kind of ancy though. I dont want to go spend 150 bucks on an 850w psu when im not sure thats the problem :p  :( 
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a b à CPUs
July 14, 2013 11:14:30 PM

What PCI-E slots are you using?
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July 15, 2013 1:33:04 AM

Can't memory bottleneck graphics performance? What are the specs of the memory and how much.

Also you don't have the iGPU enabled on the CPU do you; using the virtuMVP software right, you have all that uninstalled and disabled?
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July 15, 2013 2:43:15 AM

i dont have igpu enabled idk what the virtumvp software even is.


my ram is 8 gb 1600 mhz corsair vengeance .
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July 20, 2013 8:09:40 PM

adam_1343 said:
i dont have igpu enabled idk what the virtumvp software even is.


my ram is 8 gb 1600 mhz corsair vengeance .


If you have the ability try to increase your memory size and also get 1866 or 2133 to see if that helps (It would have to). It is a win win either way because faster memory = more bandwidth.
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a c 1107 à CPUs
July 20, 2013 8:23:17 PM

Have you tried uninstalling the gfx driver, running Driver Sweeper from safe mode and removing any remnants of Nvidia, AMD, and ATI gfx driver remnants it finds? Then re-booting/re-installing the latest gfx driver and enabling SLI again?
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a b à CPUs
July 20, 2013 9:20:30 PM

Adam Bartley said:
adam_1343 said:
i dont have igpu enabled idk what the virtumvp software even is.


my ram is 8 gb 1600 mhz corsair vengeance .


If you have the ability try to increase your memory size and also get 1866 or 2133 to see if that helps (It would have to). It is a win win either way because faster memory = more bandwidth.


You're crazy. His ram is just fine. It would do nothing to "upgrade" the ram. I would lean towards the power supply being the problem or possibly the motherboard due to 8x instead of 16x. But idk for sure on those just a guess
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December 5, 2013 6:22:29 AM

adam_1343 said:
I recently got my second gtx 680. The issue is that im only seeing like 50-65 percent usage on both cards. My processor is overclocked to 4.5 so I don't believe i should be seeing these bottlenecks. When I run a game im only seeing about 20% cpu usage for some reason as well. I can run prime 95 stable and temps dont exceed 70c. Can anyone offer insight to why my gpu usage is so low and how to fix this? I've pretty much tried everything i can think of :( 


I'm having the same issue. I have the EVGA 680 reference card along side an ASUS DCU2 I just bought (both 2 GB). I have the 3770k @ 4.0 GHz, Corsair H60, 16 GB 1866 Patriot Intel Extreme Masters RAM, Corsair TX 750 (80 Plus), ASUS Sabertooth Z77. I'm seeing stuttering and worse framerates in almost every game I've tried... Max temps: EVGA (70 C), ASUS (50 C).
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a c 1107 à CPUs
December 5, 2013 10:07:53 AM

nl223506 said:
adam_1343 said:
I recently got my second gtx 680. The issue is that im only seeing like 50-65 percent usage on both cards. My processor is overclocked to 4.5 so I don't believe i should be seeing these bottlenecks. When I run a game im only seeing about 20% cpu usage for some reason as well. I can run prime 95 stable and temps dont exceed 70c. Can anyone offer insight to why my gpu usage is so low and how to fix this? I've pretty much tried everything i can think of :( 


I'm having the same issue. I have the EVGA 680 reference card along side an ASUS DCU2 I just bought (both 2 GB). I have the 3770k @ 4.0 GHz, Corsair H60, 16 GB 1866 Patriot Intel Extreme Masters RAM, Corsair TX 750 (80 Plus), ASUS Sabertooth Z77. I'm seeing stuttering and worse framerates in almost every game I've tried... Max temps: EVGA (70 C), ASUS (50 C).


Do you have adaptive vsync enabled in the NCP? It should virtually eliminate micro-stutter if that is what you are experiencing.
http://www.geforce.com/hardware/technology/adaptive-vsy...
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December 5, 2013 10:52:08 AM

nl223506 said:
adam_1343 said:
I recently got my second gtx 680. The issue is that im only seeing like 50-65 percent usage on both cards. My processor is overclocked to 4.5 so I don't believe i should be seeing these bottlenecks. When I run a game im only seeing about 20% cpu usage for some reason as well. I can run prime 95 stable and temps dont exceed 70c. Can anyone offer insight to why my gpu usage is so low and how to fix this? I've pretty much tried everything i can think of :( 


I'm having the same issue. I have the EVGA 680 reference card along side an ASUS DCU2 I just bought (both 2 GB). I have the 3770k @ 4.0 GHz, Corsair H60, 16 GB 1866 Patriot Intel Extreme Masters RAM, Corsair TX 750 (80 Plus), ASUS Sabertooth Z77. I'm seeing stuttering and worse framerates in almost every game I've tried... Max temps: EVGA (70 C), ASUS (50 C).


From looking this http://www.realhardtechx.com/index_archivos/Page362.htm

You and the op has the same setup sorta along with the same watts on the power supply..Im leaning towards the psu try getting a 850w in there and then see what happens..I honestly dont think its the mobo being x8/x8 instead of x16/x16 as well
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a c 1107 à CPUs
December 5, 2013 11:06:54 AM

JackST said:
Hi

I'm far from an expert but doesn't a GTX 680 use like 350W at max usage?
Ref - http://uk.hardware.info/productinfo/154739/evga-geforce...

Plus the 47W - 112W that your i7 uses..
Ref - http://uk.hardware.info/productinfo/148845/intel-core-i...

Plus 2 HHD'S, an SSD, RAM, Optical drive take up about 40W - 50W?

lets say 300W + 300W + 80W + 50W = 730W? Maybe power is the bottleneck.
I'd look for a way to see how your psu's power is being shared out


According to Nvidia, the GTX maxes out at 195W (stock): http://www.geforce.com/hardware/desktop-gpus/geforce-gt...

Un-overclocked, the i7 IB is a 77W CPU at max. http://ark.intel.com/products/65523/Intel-Core-i7-3770K...

Although, I too am leaning towards the PSU being the culprit.
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December 5, 2013 12:18:14 PM

I went home and tried disabling hyper-threading. It took away all the drops in framerates that I was experiencing before, however I only tried that on Battlefield 4. I will try all my other games later to compare. If they are still running poorly, I may consider a new PSU. However, even at the bottom end @ 82% efficiency, the tx750 should be able to push at least 615 watts. Take away 195 watts for each 680 and I'll even say 100 watts for an overclocked CPU; it still leaves 125 watts for the rest of the system at worst case scenario.
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a c 1107 à CPUs
December 5, 2013 7:13:36 PM

You know... I have heard folks mention that Intel's H-T was an issue in some games, and that it was best to disable it sometimes. But I never connected that with graphic card issues. Let us know what you come up with after testing a few more games.
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December 6, 2013 5:04:34 AM

It worked! It looks really good. I also swapped my cards' positions for better heat dissipation in the process. I made sure that the SLI performance was at maximum performance (which got switched back when I swapped the cards), and turned energy saving to maximum performance as well. I hope this helps anyone with this same issue.
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a c 1107 à CPUs
December 6, 2013 10:07:16 AM

Good to hear it all worked out. And good to know about the H-T issue. Nice job of troubleshooting.
I haven't noticed the issues you were describing with my 2 x GTX 660 OC cards because my i5-2500K doesn't have H-T. But I will keep that info in mind.
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