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CPU OC Making GPU Performance Worse - Page 2

post #11 of 25
out of curiosity is you hyper-threading (HT) in BIOS set in CPU features as 'Auto' ?

-edit-

also as above someone asked about PSU. I am wondering when you tested those did you change the CPU voltage or not to get higher clock stable. as these cores the power draw is pretty darn jumpy.
Edited by TwL - 2/24/11 at 4:27pm
post #12 of 25
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Quote:
Originally Posted by TwL View Post
out of curiosity is you hyper-threading (HT) in BIOS set in CPU features as 'Auto' ?
HT is disabled.
    
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post #13 of 25
Man that is so weird. Try taking out one of your cards, testing it at stock and then testing it with your cpu oc.
post #14 of 25
Looks like the more power CPU draws the less power is left for GPUs.
Edited by Nautilus - 2/24/11 at 4:46pm
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post #15 of 25
You should include cpu-z, gpu-z, etc. in your screen shots so that we have more info to work with.

Any chance that you have the QPI link set to anything other than 4.8 in the bios?
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post #16 of 25
Quote:
Originally Posted by Nautilus View Post
Looks like the more power CPU draws the less power is left GPUs.
Yeah, pretty sure this is due to his junk PSU.
 
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post #17 of 25
Quote:
Originally Posted by Mikecdm View Post
You should include cpu-z, gpu-z, etc. in your screen shots so that we have more info to work with.

Any chance that you have the QPI link set to anything other than 4.8 in the bios?
Mine is 7.2 and running very stable.

What difference does it make regarding to OP's problem?
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post #18 of 25
Quote:
Originally Posted by Nautilus View Post
Mine is 7.2 and running very stable.

What difference does it make regarding to OP's problem?
Depending on how high the QPI speed is, it can cause worse performance in 3d applications. With such a low overclock, I doubt it would happen unless one of the higher settings were used.

For example, on my old P6T7, with QPI speed around 4ghz, my 3d scores started going backwards. Using the lowest setting I had, not including slow mode, my scores suffered around the 4ghz QPI range. That happened to be at about 4.6ghz on my 920.

If we had screen shots with more info, I would have been able to see this and may have not needed to ask the question.
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post #19 of 25
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Added info to first post
    
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post #20 of 25
It's definitely your PSU, more power to your CPU for the overlcock is leaving your cards starved for power. Try something from Seasonic or something similar i.e. reliable with accurate power ratings, your PSU probably doesn't put out the amperage it says it does...
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