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Adding a 920 D0 - oc sweet spot for fah?

post #1 of 12
Thread Starter 
Where's a good sweet spot for a 920 D0 OC to run bigadv?

Haven't run this chip in a while, but I'll be freeing up some hardware so I can plug it back in. It'll have a zalman 9900 cooler and be running open box for now in an air conditioned (read chilly) server room. It'll be matched with 1600 cl9 memory. I don't have a lot of time to fine tune the overclock, so I want to hit something pretty quick

I was thinking of starting off at 4.0GHz, running that for a week, then pushing up depending on temps, but how much vcore would I approximately need? 1.3V? 1.4V? 1.45V? Is there a frequency sweetspot for folding on a 920 that I should stick to? Most of my overclock experience has been on other chips e.g. gulftown or wolfdale.
     
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post #2 of 12
If you can get it anywhere between 4.0-4.2ghz then I'd say that's about perfect. 1.4v (or slightly lower) should be able to get you there.
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post #3 of 12
run 4ghz with D0, vcore should be around 1.3v - 1.35v
post #4 of 12
Thread Starter 
Cool thanks + rep!
     
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post #5 of 12
Quote:
Originally Posted by sbinh View Post
run 4ghz with D0, vcore should be around 1.3v - 1.35v
I have D0 and have BIOS set to 1.375 and cpuz reads a vdroop to 1.352v
But my chip isnt the best
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post #6 of 12
maybe i'm just lucky to get sweet ones ..

here is one



2nd one



3rd one:


Edited by sbinh - 7/21/11 at 3:57pm
post #7 of 12
Every chip is different. You will have to play around with it to find the sweet spot. My i7 930 runs at 4.2 1.3v folding stable. Yours may do better but there is only one way to find out
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post #8 of 12
depends on the work unit, 6900/01, 2686 and 2685 units finish relatively early (anything up to 24 hours) before deadline with as little as say a 3.8ghz overclock.

Your problems start when you get the 2684 units...these pig of a units need a 4ghz overclock and need to be left virtually for the whole deadline (i.e you cant go playing games while folding), otherwise they just dont make the deadline.
post #9 of 12
4.2GHz is a nice round number OC and will run 1600MHz RAM at spec if you're using the 21x cpu multi 8x RAM multi and 200 Bclk.
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post #10 of 12
Thread Starter 
Quote:
Originally Posted by $ilent View Post
depends on the work unit, 6900/01, 2686 and 2685 units finish relatively early (anything up to 24 hours) before deadline with as little as say a 3.8ghz overclock.

Your problems start when you get the 2684 units...these pig of a units need a 4ghz overclock and need to be left virtually for the whole deadline (i.e you cant go playing games while folding), otherwise they just dont make the deadline.
Cool I was concerned at 4.0 I might not hit some bigadv deadlines, however this will be running 24/7 so it seems like I should be good
     
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