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Core i7 920

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December 30, 2011 7:16:23 AM

Hi All

I have a core i7 920 Bloomfield CPU o/c to 3.6Ghz..V1.25

My temps idle are low 40s sometimes even lower. Using air cooler... Noctua

I think i can get more speed if i increase the voltage of the cpu, i am running Asus Rampage II , Geforce GTX 590 , 6GB Tri Channel ram..@722 (9-9-9-24)

Any ideas what i can set the vol and will it help to alleviate the bottleneck with the muct much faster graphic card...? any suggestions Thank you! :bounce: 

More about : core 920

a b à CPUs
a b K Overclocking
December 30, 2011 9:31:00 AM

We dont want to know Idle temps!!!

Show us load - Prime 95 - Small FFTs
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a c 172 à CPUs
a c 197 K Overclocking
December 30, 2011 9:51:24 AM

If your load temps are under 70 C and your CPU voltage is under 1.45 volts, you have some room to work with.
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December 31, 2011 10:58:21 AM

Best answer selected by milianoart.
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a b K Overclocking
January 2, 2012 2:11:53 PM

Umm I know you have your answer but here is my 2cents. I had that processor and 3.6GHz was the sweet spot. It ran prime95 for 12 hours with voltage on auto(roughly 1.25 same as you) and topped out at 68 degrees. Once I past 3.6 to 3.8 then 4 and as high as 4.2 the temps got high really fast. The rated temp from intel under full load for that cpu is 68 degrees with a max allowable cpu vcore of 1.375V. I run my i7 965ee at 1.4V full time so I do agree with jsc. You won't need to worry about the voltage if you have the D0 revision but your temps are going to climb fast. At 3.8GHz I was hitting around 76 degrees with water cooling. Then at 4GHz i would hit roughly 84 and at 4.2GHz I would hit 90 within 5 seconds of starting prime95 and my overheat protection would kick in and shut my system down. The reason I am telling you this is because for benchmarking I found with the sli gtx 460's I was using going from 3.6GHz to 4GHz added less than 100 to a score of over 7400. A really pitiful increase for the amount of overclock and not worth it in my eyes due to the excessive heat generated. Is your cpu really bottlenecking your gtx 590? I am running an i7 965 at 3.6GHz along with an hd 6990 crossfired with an hd 6970 and though all of my cores are running while playing bf3 none ever go above 75% use. I would be looking more to your 6GB of RAM as potentially bottlenecking. I don't know what you play but with just my 6990 running in bf3, my peek RAM usage hit 5.9GB. My other setup that had sli gtx 460 1GB peeked at 5.5GB with the i7 920.
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January 6, 2012 3:29:51 AM

alrobichaud said:
Umm I know you have your answer but here is my 2cents. I had that processor and 3.6GHz was the sweet spot. It ran prime95 for 12 hours with voltage on auto(roughly 1.25 same as you) and topped out at 68 degrees. Once I past 3.6 to 3.8 then 4 and as high as 4.2 the temps got high really fast. The rated temp from intel under full load for that cpu is 68 degrees with a max allowable cpu vcore of 1.375V. I run my i7 965ee at 1.4V full time so I do agree with jsc. You won't need to worry about the voltage if you have the D0 revision but your temps are going to climb fast. At 3.8GHz I was hitting around 76 degrees with water cooling. Then at 4GHz i would hit roughly 84 and at 4.2GHz I would hit 90 within 5 seconds of starting prime95 and my overheat protection would kick in and shut my system down. The reason I am telling you this is because for benchmarking I found with the sli gtx 460's I was using going from 3.6GHz to 4GHz added less than 100 to a score of over 7400. A really pitiful increase for the amount of overclock and not worth it in my eyes due to the excessive heat generated. Is your cpu really bottlenecking your gtx 590? I am running an i7 965 at 3.6GHz along with an hd 6990 crossfired with an hd 6970 and though all of my cores are running while playing bf3 none ever go above 75% use. I would be looking more to your 6GB of RAM as potentially bottlenecking. I don't know what you play but with just my 6990 running in bf3, my peek RAM usage hit 5.9GB. My other setup that had sli gtx 460 1GB peeked at 5.5GB with the i7 920.


Sorry for replying now on your message, and thank you for the extensive summary...this really helped me more than you know! yes i did see that my ram is topping out with SC2 and most of the highend games...i have resumed my CPU back to as you call it the sweet spot at 3.6 and voltage 1.2750...and its holding at 40-43 idle - peak at 68-73...so i guess its ok....i jst wonder if i drop the voltage or increase it slighty will it make it faster or stable?

thanks again!
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