Sign in with
Sign up | Sign in
Your question

i7 920/930/9xx Sweet Spots

Last response: in Overclocking
Share
a b à CPUs
a b K Overclocking
July 15, 2010 1:43:35 AM

Hello everyone! :hello: 

The past few days I have been wandering around the internet trying to find people's best 920/930 overclocks based on voltages more so than maximum frequency, and it's been a difficult hunt. There are tons of people with the chips at 4GHz and above, but I'm curious as to what your "sweet spot" is for the chip... or most "efficient" OC, rather than max stable.
For example: I'm seeing people report chips hit up to 3.8 on stock voltages, then a decent voltage jump to 4.0, and even a larger one to 4.2.

-What's the lowest voltage your chip runs with @ 3.6? Lowest voltage @ 3.8? Lowest voltage @ 4.0? 4.2? etc..
(What are your other voltages at? not just CPUv)

-What cooler do you have? What temps are you getting at each setting?

-What's your batch number?

Finding the max stable is really fun, but how about an efficient 24/7 setting? with the choice of loading your max setting profile when you want the extra juice.
I just think this would be helpful for newbies and experienced OC'ers alike, so if you'd care to add a reply and share your experiences, that would be awesome.

(If anyone knows of a similar thread anywhere, or if this is a double post, let me know please!)


SUBMITTED CHIPS:


blckhaze ----------------------------- 920 D0 --- 3990MHz --- 1.231v --- 38C/71C --- HT, Turbo
SpinachEater ----------------------- 930 D0 --- 3900MHz --- 1.250v --- 38C/61C ---
redechelon -------------------------- 930 D0 --- 4011MHz --- 1.1875v - 41C/60C ---
Hard Line ---------------------------- 930 D0 --- 4300MHz --- 1.296v --- 45C/75C --- HT
mdbrotha03 ------------------------- 920 D0 --- 4011MHz --- 1.200v --- 45C/75C --- HT, Turbo
a b à CPUs
a b K Overclocking
July 15, 2010 1:57:42 AM

Maybe a template would help organize... if this thread gets posts, I'd be happy to update the original post with everyone's settings.

920/930/other:
Revision:
Stepping:
Batch No.:

Frequency:
Voltage:

Motherboard:
Memory:
Case:

Cooler:
Idle Temp:
Load Temp:
Ambient Temp:

Hyper-Threading:
LLC/vDroop:
SpeedStep:
Turbo:

Other Voltages:
m
0
l
a b à CPUs
a b K Overclocking
July 15, 2010 8:15:14 PM

Well, I'll try to get this thing started I guess.

920/930/other: 930
Revision: D0
Stepping: 5
Batch No.: 3002A574

Frequency: 3717MHz
Voltage: 1.106v

Frequency: 3801MHz
Voltage: 1.150v

Frequency: 4011MHz
Voltage with HT: 1.206v
Voltage w/o HT: 1.1875v

Motherboard: EVGA 132-BL-E758-A1
Memory: 6GB OCZ Obsidian @ 1450Mhz 8-8-8-21
Case: Antec Twelve-Hundred

Cooler: Sunbeamtech Core Contact Freezer 120mm
Idle Temp: 40C @ 3.8GHz, 41C @ 4.0GHz
Load Temp: 63C @ 3.8GHz, 71C @ 4.0GHz
Ambient Temp:

Hyper-Threading: Enabled
LLC/vDroop: Disabled
SpeedStep: Disabled
Turbo: Disabled

Other Voltages:

CPU PLL - 1.875v
QPI PLL - 1.35v
VTT - [+25mV] 1.21v
IOH - 1.125v
ICH - 1.125v
m
0
l
Related resources
July 15, 2010 9:00:18 PM

Hey I am about to embark on my 930 OC as well. I need to research all of the different settings but I will contribute to this post in a few days when I start. I am with you though, information seems to be scattered about so it is helpful to see what voltages people are using.
m
0
l
a b à CPUs
a b K Overclocking
July 15, 2010 9:09:50 PM

SpinachEater said:
Hey I am about to embark on my 930 OC as well. I need to research all of the different settings but I will contribute to this post in a few days when I start. I am with you though, information seems to be scattered about so it is helpful to see what voltages people are using.


Right on, yeah let me know how it goes. It'd just be nice to compile some settings other than 4.0 only. There's a significant temp/voltage drop to 3.8 for me, and a very small performance drop.. so it seems to be more practical. Just wondering what other batches/chips are like, just for people's reference and so I know what to expect for OC'ing friends' chips and things.
m
0
l
a c 309 à CPUs
a c 121 K Overclocking
July 15, 2010 9:15:48 PM

It is nice to see a few examples, but realizr that there are several variables, some unknowable. :
1) Chips are all slightly different, even from the same batch and stepping.
2) How well the cpu cooler was mounted may be more important than the cooler type.
3) What is the ambient temperature.
4) How good is the case cooling.
5) Are there some hot vga card/s involved?

Is the overclock a maximum effort, a best stable effort, or just a minor tweaking.

For my part, I just use a 920 c0 with a slight OC to 3.2.
m
0
l
a b à CPUs
a b K Overclocking
July 15, 2010 9:59:01 PM

geofelt said:
It is nice to see a few examples, but realizr that there are several variables, some unknowable. :
1) Chips are all slightly different, even from the same batch and stepping.
2) How well the cpu cooler was mounted may be more important than the cooler type.
3) What is the ambient temperature.
4) How good is the case cooling.
5) Are there some hot vga card/s involved?

Is the overclock a maximum effort, a best stable effort, or just a minor tweaking.

For my part, I just use a 920 c0 with a slight OC to 3.2.


1) Of course they are, that's the point of this thread... to get an IDEA of what to expect, based on other setups.
2) I'm assuming that if people can overclock to 3.6-4.0, they know how to seat their cooler.
3) We can add this to the template.
4) We can add this to the template.
5) We can add this to the template, although this is correlated to the ambient.

And whether the OC is maximum or minor also is the point of this thread... the sweet spot... in other words, your best voltage to frequency ratio.
m
0
l
a b à CPUs
a b K Overclocking
July 16, 2010 1:23:59 AM

redechelon said:
I'm assuming that if people can overclock to 3.6-4.0, they know how to seat their cooler.

That's a BIG assumption :D 

Dammm I need a 930, my 860 sucks up the juice like a 10 year old at a pool party.

m
0
l
July 16, 2010 3:56:51 AM

geofelt said:
It is nice to see a few examples, but realizr that there are several variables, some unknowable. :
1) Chips are all slightly different, even from the same batch and stepping.
2) How well the cpu cooler was mounted may be more important than the cooler type.
3) What is the ambient temperature.
4) How good is the case cooling.
5) Are there some hot vga card/s involved?

Is the overclock a maximum effort, a best stable effort, or just a minor tweaking.

For my part, I just use a 920 c0 with a slight OC to 3.2.


1. For sure but it will be nice to compile a range. Also, mobos are different and given the manufacturer, chipset, and, cooling, it will impact OCs for certain.

2. Mega for sure. I was just installing mine and I put it on several different ways just to play around with various thermal paste adjustments. Depending on fan orientation and how I applied thermal paste, I was getting a Prime95 run temps (at stock settings of 2.8Ghz) from 56-70C. It is crucial to make sure your heatsink is installed to be at it's top notch cooling potential. If I took my 70C install, I would have been screwed for OC range.

3. Definitely. I will include that with my settings. winter temps make a huge difference. Lucky we are in the summer so this should be roughly the worst case scenario.

4. Case style would be good info as well.

5. Meyeah. Not really important with a well vented case but will definitely play a factor if someone has a stuffy case.
m
0
l
a b à CPUs
a b K Overclocking
July 16, 2010 4:52:00 AM

There's no way to get a thread like this perfectly accurate. In forums, we're just going to have to expect human error. :) 
The point of the thread was to gather information from numerous people to see a sort of... average. It would help give you an idea of what to expect before overclocking and would be used as a guide, not a bible. Also, you could compare your chip to others to see where you specific CPU's performance is at and how you can improve it in certain areas.
m
0
l
July 16, 2010 2:00:38 PM

Yeah all of the little deviations are just part of posting up OC settings. I was finding that turning of HT drops temps and stabilizes higher clocks quite a bit. Have you tried messing around with that?
m
0
l
a b à CPUs
a b K Overclocking
July 17, 2010 4:34:05 AM

SpinachEater said:
Yeah all of the little deviations are just part of posting up OC settings. I was finding that turning of HT drops temps and stabilizes higher clocks quite a bit. Have you tried messing around with that?


Yeah, it does decrease temps a good chunk (often 10C?), but I'm already satisfied with my temps and I'd prefer to not sacrifice performance if it's avoidable. I haven't tried benchmarking a difference though... would be interesting. In articles I've read, HT seems to make a 0-20% gain, usually about 10% or less. If you could reach a much higher clock without hyper-threading enabled, it might be worth it, I dunno though.
m
0
l
July 17, 2010 3:35:48 PM

Yeah that is what I am curious about. Can you get higher clocks with HT off to compensate performance at lower clocks with HT on? I wanted to play with that a bit to see what was going on. Most games don't use more than 4 cores. I was watching my core usage and benchmarks are always just using 4 threads. The only thing I see using all 8 is Prime95 atm.
m
0
l
a b à CPUs
a b K Overclocking
July 17, 2010 5:55:27 PM

Yeah... I think it would depend on the application being used, but the more I read about it, the more I'm tempted to turn off HT. I don't think it helps in games at all, so obviously a higher clock would do something there (Even though it would be minor, it's mostly in the graphics cards). In general productivity though, I'm not so sure... I guess it would depend on how much higher of a clock you could achieve. If you do rendering and converting really often, I'm sure it's worth it... but I don't use programs like that often enough.

I'm stuck on my laptop for the next few days, otherwise I'd see how high I could go. 10C would provide some nice headroom =]
m
0
l
July 18, 2010 2:56:11 AM

When I watch core usage, the load only alternates between 4 threads and the other 4 always look dead. Bit-tech just had a good article about core usage with games and it looks like most of them only need 3 right now. (Edit - Most of the games they tested that is.... I wish they looked at a lot more games but this type of test should be easy for anyone to do)
http://www.bit-tech.net/hardware/cpus/2010/07/05/how-ma...

Yeah I'm with you on that one. If I was doing heavy processing with video conversion I might not consider turning it off but since I am primarily doing this OC for max FPS in games, I want to really look into it because I am thinking higher clocks across 4 cores will trump lower clocks on 8 threads.

Same here. I haven't been home in a while so I haven't gotten a chance to test this out. I got a stable 4Ghz with HT off and was getting excellent temps but I didn't get to benchmark thoroughly yet.
m
0
l
July 18, 2010 4:11:26 AM

Jeez, sorry to highjack your thread on this HT tangent but this is pretty interesting. It looks like you can indeed benefit from turning HT off to get higher clocks. I am finding a lot of evidence that HT mostly causes a small drop in gaming performance.

http://ixbtlabs.com/articles3/cpu/ci7-turbo-ht-p2.html
m
0
l
a b à CPUs
a b K Overclocking
July 18, 2010 6:54:12 AM

SpinachEater said:
Jeez, sorry to highjack your thread on this HT tangent but this is pretty interesting. It looks like you can indeed benefit from turning HT off to get higher clocks. I am finding a lot of evidence that HT mostly causes a small drop in gaming performance.

http://ixbtlabs.com/articles3/cpu/ci7-turbo-ht-p2.html


Nah, I'm just waiting for someone to post their results if it will ever happen =P. When I get home, I'll change HT settings around and benchmark... I'll post differences.

Yeah, interesting articles... they all seem to get different percentages, but the basic idea of them is the same. HT aids in certain programs, but for games, it even often hurts performance... which is pathetic. I wish more games supported more than 3 cores/threads currently.
m
0
l
a b à CPUs
a b K Overclocking
July 19, 2010 6:42:07 PM

Alright, I tried disabling Hyper-Threading at 4.0 and it lowered my temps at load to 63C with Prime95. With HT, it loads at about 72C. It allowed me to lower my voltage further also: from 1.206 to 1.1875. So, now it loads at 60C... that's pretty damn good, but later tonight, I'll bench it to see if there's a significant performance shift. If it's a very similar or identical score in programs like 3DMarkVantage and Heaven, then I'll keep it disabled for sure. I don't record and edit often enough to care about performance in those areas... mainly gaming and simple programs.
m
0
l
July 20, 2010 1:56:18 AM

Wow, interesting. I am playing around with mine tonight to see what is up. My RAM seems to be giving me some sass though.
m
0
l
July 20, 2010 4:35:17 AM

Hey red, I am having some weird issues can you help? I am hitting 3.8 and 4.0 GhZ just fine and with great temps (64C max at 4Ghz with HT off) I am running Prime 95, memtest, Stone Giant, AVP, Heaven, and Final Fantasy benchmarks with no issues what so ever at 4.0 Ghz but when I start up a real game like Crysis or BF BC2, I go to BSOD.

Do you have an idea as to what would cause a game to crash but not any of the benchmarks? I am starting with high voltages and working my way down but nothing at 3.8 and up seems to allow games to run.

I first thought it was my RAM but I downclocked the crap out of it and I still BSOD. Would you have any ideas regarding why I am crashing in games but not with benchmarks?
m
0
l
a b à CPUs
a b K Overclocking
July 20, 2010 4:46:04 AM

SpinachEater said:
Hey red, I am having some weird issues can you help? I am hitting 3.8 and 4.0 GhZ just fine and with great temps (64C max at 4Ghz with HT off) I am running Prime 95, memtest, Stone Giant, AVP, Heaven, and Final Fantasy benchmarks with no issues what so ever at 4.0 Ghz but when I start up a real game like Crysis or BF BC2, I go to BSOD.

Do you have an idea as to what would cause a game to crash but not any of the benchmarks? I am starting with high voltages and working my way down but nothing at 3.8 and up seems to allow games to run.

I first thought it was my RAM but I downclocked the crap out of it and I still BSOD. Would you have any ideas regarding why I am crashing in games but not with benchmarks?


Weird... what tests are you running in Prime95, Blend?

What RAM do you have and what settings/timings/voltage?

Maybe if you post your CPU overclock settings too, that would help. Maybe something will stick out.
m
0
l
a b à CPUs
July 20, 2010 5:42:37 AM

920
Revision: D0
Stepping: 5


Frequency: 3.990
Voltage: 1.231


Motherboard: P6T V2
Memory: 12gb 1600 Dominator 8-8-8-24 @ 1520mhz
Case:


Cooler: H50
Idle Temp: 38~
Load Temp: 71~
Ambient Temp: 24c


Hyper-Threading: 8
LLC/vDroop:
SpeedStep: ON
Turbo: ON

Other Voltages: Dram 1.35 & 1.66

1.225vcore ran for 3 hours before prime95 stopped working
1.231vcore ran prime95 for 9+ hours in 2 different instances, with memtest x4.
Overclocking to 4.2ghz required the vcore to be 1.263, so it was quite a big jump for that (the 200 bclk) so I think 1.231 with bclk 190 is the sweet spot on this 920.
m
0
l
July 20, 2010 6:02:18 AM

Ok, I am currently stuck at 3.5GHz and I am trying to minimize Vcore to drop below 1.29375V because it sounds like I should be able to go a lot lower ATM. I will update this post as I find the lowest voltages.

920/930/other: 930
Revision: D0
Stepping: 5
Batch No.: ?

Frequency: 3.90
Voltage: 1.250V
Multiplier: 21x
Blck: 186
Uncore: 2x RAM clocks

Motherboard: Gigabyte GA-X58A-UD3R (v2.0)
Memory: 6 GB Mushkin (3x2GB) 9-9-9-24
Case: Antec 900

Cooler: Xigmateck S1283

Hyper Threading OFF
Idle Temp: 38-35-36-33C (core 1-2-3-4)
Load Temp: 61-58-57-55C (core 1-2-3-4) with Prime 95

Hyper Threading On
Idle Temp 38-34-35-32C (core 1-2-3-4)
Load Temp 68-66-64-63C (core 1-2-3-4) with Prime 95


Ambient Temp: 26C

Hyper-Threading:o ff (on for some tests)
LLC/vDroop: Off
SpeedStep: Off
Turbo: Off

Other Voltages:
QPI/VTT: 1.255v
CPU/PLL: 1.80v
PCIe: 1.50v
QPI/PLL: 1.10v
IOH Core: 1.240v
ICH I/O: 1.50v
ICH Core: 1.240v
DRAM: 1.540v (1333 Mhz)
m
0
l
a b à CPUs
a b K Overclocking
July 20, 2010 6:53:39 AM

Blckhaze said:
920
Revision: D0
Stepping: 5


Frequency: 3.990
Voltage: 1.231


Motherboard: P6T V2
Memory: 12gb 1600 Dominator 8-8-8-24 @ 1520mhz
Case:


Cooler: H50
Idle Temp: 38~
Load Temp: 71~
Ambient Temp: 24c


Hyper-Threading: 8
LLC/vDroop:
SpeedStep: ON
Turbo: ON

Other Voltages: Dram 1.35 & 1.66

1.225vcore ran for 3 hours before prime95 stopped working
1.231vcore ran prime95 for 9+ hours in 2 different instances, with memtest x4.
Overclocking to 4.2ghz required the vcore to be 1.263, so it was quite a big jump for that (the 200 bclk) so I think 1.231 with bclk 190 is the sweet spot on this 920.


Nice, thx blckhaze. :wahoo: 

Yeah, the jump to 200 BCLK is much larger for me too, so it's not really worth it.
m
0
l
a b à CPUs
a b K Overclocking
July 20, 2010 7:14:26 AM

SpinachEater said:
Ok, I am currently stuck at 3.5GHz and I am trying to minimize Vcore to drop below 1.29375V because it sounds like I should be able to go a lot lower ATM. I will update this post as I find the lowest voltages.

920/930/other: 930
Revision: D0
Stepping: 5
Batch No.: ?

Frequency: 3.50
Voltage: 1.29375V
Multiplier: 21x
Blck: 166
Uncore: x20 ( = 2x RAM clocks)

Motherboard: Gigabyte GA-X58A-UD3R
Memory: 6 GB Mushkin (3x2GB) 8-8-8-24
Case: Antec 900

Cooler: Xigmateck S1283
Idle Temp: 40-36-38-34C Max (core 1-2-3-4)
Load Temp: 61-59-58-55C Max (core 1-2-3-4)
Ambient Temp: 26C

Hyper-Threading: Off
LLC/vDroop: Off
SpeedStep: Off
Turbo: Off

Other Voltages:
QPI/VTT: 1.255v
CPU/PLL: 1.80v
PCIe: 1.50v
QPI/PLL: 1.10v
IOH Core: 1.240v
ICH I/O: 1.50v
ICH Core: 1.240v
DRAM: 1.540v (1333 Mhz)


Just a thought, but try increasing your QPI PLL to 1.3-1.35 or something to see if it helps.
m
0
l
July 21, 2010 4:10:08 AM

Spot on sir. I am up to 3.90 now and running pretty stable. I updated my post for the current settings. Now I can't seem to break 4.0 but I am happy with what I am getting at 3.9

I can prob go through and drop some more voltages to fine tune it. I am pretty shocked at how high you can get the CPU clocks with such a low Vcore.
m
0
l
a b à CPUs
a b K Overclocking
July 21, 2010 5:22:11 AM

SpinachEater said:
Spot on sir. I am up to 3.90 now and running pretty stable. I updated my post for the current settings. Now I can't seem to break 4.0 but I am happy with what I am getting at 3.9

I can prob go through and drop some more voltages to fine tune it. I am pretty shocked at how high you can get the CPU clocks with such a low Vcore.


Awesome, that looks pretty good. :sol:  1.25v & 61C. I'll update the main post if it means anything lol...

And I dunno how it does it, it just does. I raised a few of the voltages a bit actually, they crashed in long Prime95 tests. I updated the posts a bit back...
m
0
l
July 21, 2010 6:34:23 PM

Yeah people poo on the Xigmatek S1283 cooler for the new i7s but it is rocking out for me.

I was down by your vcore (1.206v) but I was getting a single core crashing out in Prime95. I am prob a bit over the necessary vcore but I gave up tweaking last night because I wanted to get some gaming in!

What is great is that when I game, nothing uses 100% of all 4 cores so I am even below 61C in real life temps.
m
0
l
a b à CPUs
a b K Overclocking
July 22, 2010 6:36:49 AM

The cooler rates pretty well on frostytech.

Yeah, Prime95 and other stress tests always produce much higher temps than full load in games. Some overclock their CPU to temps further than recommended because they can count on the CPU never reaching that temp in real-world applications... I wouldn't though. =P
m
0
l
July 23, 2010 12:19:26 AM

Hmm, I did some HT ON vs OFF tests. I ran 3D Mark 06 at my 3.9Ghz

HT ON
Overall: 25316
CPU: 6747

HT OFF
Overall: 24876 (-440 points, -1.7%)
CPU: 6280 (-467 points, -6.9%)

There is an ever so slight difference but it is probably all due to the CPU score from the CPU rendering tests.
m
0
l
a b à CPUs
a b K Overclocking
July 23, 2010 12:20:48 AM

I think i got me a golden chip I got a 930 running stable at 4.3 205x21 with hyperthreading on with 1.296v never tops 75C under prime/Linx ( I'm using a Noctua D-14 and AS5 btw)
m
0
l
July 23, 2010 12:58:11 AM

Can you post your settings with red's format way above? It will be helpful to see what all of your voltages are set to other than Vcore
m
0
l
a b à CPUs
a b K Overclocking
July 23, 2010 1:23:35 AM

Interesting results... thanks Spinach, I still have to test mine too.

Thanks Hard Line, I'll post yours template or not, but it would be nice to see. That is a nice chip.
m
0
l
July 23, 2010 3:35:44 AM

My i7 920 runs at 21x191 1.2v

Ran Intel Burn in with 20 runs at max memory and 8 threads.

Test was successful. 75c was the highest core temp using a D14 in a warm room.

Idle Temps around 45c

Gaming Temps in the Mid 50s

HT and Turbo on

All other voltage on Auto

All other settings at default values.
m
0
l
a b à CPUs
a b K Overclocking
July 23, 2010 5:04:19 AM

I appreciate all the info you gave, but if I'm going to post it, I need all of it.. Idle temps, other voltages, HT?, etc
m
0
l
July 23, 2010 5:26:26 AM

redechelon said:
I appreciate all the info you gave, but if I'm going to post it, I need all of it.. Idle temps, other voltages, HT?, etc


updated
m
0
l
a b à CPUs
a b K Overclocking
July 23, 2010 5:45:03 AM

mdbrotha03 said:
updated


Thank you. Just to make sure, it's 1.200v? and I'm assuming that it's a D0?
m
0
l
July 23, 2010 5:48:48 AM

Yes, its a DO. I also have my CPU z val in my sig now. When I put 1.2v in the bios it comes out as 1.192v. Also its 191x21. If you at CPU z its 190.84
m
0
l
a b à CPUs
a b K Overclocking
July 23, 2010 6:47:12 AM

mdbrotha03 said:
Yes, its a DO. I also have my CPU z val in my sig now. When I put 1.2v in the bios it comes out as 1.192v. Also its 191x21. If you at CPU z its 190.84


Alright, updated =]
m
0
l
July 23, 2010 1:19:54 PM

Hey guys, I am having some trouble getting my rig stable at 4ghz. Although, I am not exactly sure what to set my voltages at to get it stable. As it stands now, i can run prime95 for about 5min before it will freeze or bsod. I had it running stable at 3.52 ghz (22/160) at 1.2125 vCore with temps getting into the upper 60s... so i know i can push it further. Any guidance would be greatly appreciated!

920/930/other: 930
Revision: D0
Stepping: 5
Batch No.: ? (not sure, at work)

Frequency: 4.01ghz (21/191)
Voltage: 1.225

Motherboard: Asus P6X58D-E
Memory: 8gb G.SKILL Ripjaws Series DDR3 1600 (1.6v 7/7/7/24)
Case: Silverstone Fortress FT02B

Cooler: Cooler Master Hyper 212+
Idle Temp: 42-46 across all for cores
Load Temp: 72-75 across all 4 cores
Ambient Temp: ~28

Hyper-Threading: Yes
LLC/vDroop: Yes
SpeedStep: No
Turbo: No

Other Voltages: Everything is Auto except for vCore and DRAM voltage
m
0
l
July 23, 2010 3:49:24 PM

I wouldn't run with auto voltage settings because you have no clue where the instability is coming from. It could be your RAM, could be CPU, could be the chipset...
m
0
l
a b à CPUs
a b K Overclocking
July 23, 2010 6:12:30 PM

Hey awilson. Yeah try setting some of our voltages to match ours. The first thing I always ask is what your memory multiplier is at... if you're increasing your BCLK, it's raising what your memory is running at. So at 191, you need it at 8x for a total of 1528MHz.
m
0
l
a b à CPUs
a b K Overclocking
July 23, 2010 6:40:49 PM

I just tested Heaven with HT on and off max settings, I saw a 1.8% loss also... which is tiny. I'm sure in a more CPU taxing program or in the Physics test of 3DMarkVantage, it would score lower.. but for gaming, it practically makes no difference in performance with a 10C temperature drop.

(Graphics card side note... I also tried turning on ambient occlusion for one of them which looks awesome, but made some textures act strangely. In a game like CS:S, or tf2, it helps add much more detail and doesn't hurt performance too much. Have you checked this out?)
m
0
l
July 23, 2010 9:23:24 PM

Alright, so i read through a few more threads and tutorials and messed around with my voltages a little more and got it stable running prime95 for about 30min. I know this isnt really a long enough time to tell if it will be stable or not, but i just wanted to check and make sure my voltages looked good before i run a more extensive stress test.

according to cpu-z, i have:

4009.1 MHz (21x190.9)
vCore: 1.2875 (CPU-Z is reading 1.264??)
QPI: 1.275
PLL: 1.88
IOH: 1.14
DRAM: 1.6 (7/7/7/24)

and i got temps of: (I figure these are about right since the ambient temp is 34 degrees right now)
idle: 48 46 48 45
load: 81 80 77 78
m
0
l
a b à CPUs
a b K Overclocking
July 24, 2010 12:20:00 AM

awilson said:
Alright, so i read through a few more threads and tutorials and messed around with my voltages a little more and got it stable running prime95 for about 30min. I know this isnt really a long enough time to tell if it will be stable or not, but i just wanted to check and make sure my voltages looked good before i run a more extensive stress test.

according to cpu-z, i have:

4009.1 MHz (21x190.9)
vCore: 1.2875 (CPU-Z is reading 1.264??)
QPI: 1.275
PLL: 1.88
IOH: 1.14
DRAM: 1.6 (7/7/7/24)

and i got temps of: (I figure these are about right since the ambient temp is 34 degrees right now)
idle: 48 46 48 45
load: 81 80 77 78


Looks pretty good. 30 min isn't a long time like you said, but it's long enough to suggest you're close.

80C is about right considering your ambient and your cooler. I always recommend the 212+ from a value standpoint, but at 4GHz 75-80C sounds right.
I think your voltages are reading lower because you have LLC enabled.
m
0
l
July 24, 2010 8:48:48 PM

Got a chance to do more hyperthreading experiments. I play a lot of bad company 2 so since it doesn't have a benchmark I thought I would use FRAPS and try something like walk through an empty map on the same path. I used Panama Canal and walked down the middle of the road with HT on and HT off.

I noticed when I loaded the game up it maxed out all 8 threads and also when I play, it seems to use a lot of hyperthreading (using all 8 threads as well) vs some games that only use 4 threads and the other 4 have no activity. I thought HT being on would be a great benefit in this case but it turns out that it doesn't make much of a difference with my settings.

CPU - 3.90 Ghz
GPU - 780Mhz
Resolution - 1680x1050


HT ON
MIN-55,
MAX-89,
AVG-70.345

HT OFF -
MIN-57,
MAX-91,
AVG-70.172
m
0
l
a b à CPUs
a b K Overclocking
July 25, 2010 4:22:28 AM

Huh... Half way through after you said it was using 8 threads, I was expecting you to say it made a huge difference.

Well, from looking at multiple reviews, benchmarking, and seeing your results too... HT doesn't benefit games. I mean... yes maybe a very very small percentage, but not only is it invisible to the naked eye... numbers confirm that it's VERY small, if any. A lot of game benchmarks I was looking at even saw a 1-2% loss on average, which is similar to your findings.

If all you do is game... and don't render/edit/model/etc, it would seem foolish to have Hyper-Threading on. Even if it yields a 5C drop, that's nice.
m
0
l
July 25, 2010 2:58:39 PM

Me too. I saw how it was using all of the threads pretty heavily so I was thinking that it would make a difference. My only other thought is that perhaps the high CPU clocks are making me GPU bound and HT doesn't matter at this point.

I can either downclock the CPU and do HT ON/OFF or go down to a lower resolution and maybe I will become CPU bound again.
m
0
l
a b à CPUs
a b K Overclocking
July 25, 2010 4:20:43 PM

That's a good point... Lowering resolution would work I bet, I'm not sure if you could lower an i7-930 enough though. Well, at least we know that at 4.0GHz, it doesn't make a difference =P
m
0
l
a b à CPUs
a b K Overclocking
July 27, 2010 12:08:06 PM

ok here goes

920/930/other: i7 930
Revision: D0
Stepping: 5
Batch No.: 3002A652

Frequency: 4300
Voltage: 1.296v

Motherboard: Gigabyte X58A-UD3R rev 2
Memory: 6GB Mushkin Redline Enhanced 6-8-6-24-1T @1640mhz
Case: Haf 922

Cooler: Noctua D-14
Idle Temp: 45C
Load Temp: 75C
Ambient Temp: 33C

Hyper-Threading: ON
LLC/vDroop: LVL 2
SpeedStep: ON
Turbo: OFF

Other Voltages:

CPU PLL: 1.8
QPI/Vtt: 1.355
DRAM 1.66
DRAM Termination: 0.75
QPI-PLL: 1.1
IOH Core: 1.18
ICH I/O: 1.5
ICH Core: 1.1
m
0
l
!