Trying to push overclock further

ianthenewb

Honorable
Nov 3, 2013
5
0
10,510
My setup:
PSU Corsair HX850 850W R
Z77 extreme9 motherboard
16GB(2X8GB) Corsair XMS3 DDR3 1600
I5 3570K Noctua NH-D14
2X GTX 670 SLI

So I'm currently at 4.3GHz @1.2v and realtemp shows my cores at 70-75C between the 4 of them. I've gone to 4.6 with higher voltage, prime95 stable for 8 hours, temps in the low 80's, and no whea logger errors. But once I start gaming I'll have lockups and blue screens and whea errors. Strangely enough, when I remove one of my video cards and run without SLI the overclock is stable again. My system stops crashing and blue screening and the whea errors stop too! Any ideas? I'm sort of new to this and not sure where to go from here. I'd really like to keep my SLI!
 
Solution
The other thing I forgot to mention, and you may not want to hear it, is that Crossfire and or SLi can be very very taxing on the cpu. You may have reached the limit of your OC when coupled with SLI. It seems that at baseline you were already getting pretty close to the threshold with your current set-up.

minerva330

Honorable
Dec 27, 2013
449
0
10,960
Prime 95 doesn't care about your video cards so I would say that your OC is stable at baseline.

What are your temps/cooling situation like? A second card worsens case cooling and increases cpu/motherboard/VRM temps, this in turn makes out for increased errors. You could try to test it by opening up your case and put a LARGE room fan blowing towards the CPU cooler.

 

minerva330

Honorable
Dec 27, 2013
449
0
10,960
The other thing I forgot to mention, and you may not want to hear it, is that Crossfire and or SLi can be very very taxing on the cpu. You may have reached the limit of your OC when coupled with SLI. It seems that at baseline you were already getting pretty close to the threshold with your current set-up.
 
Solution

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