Can't get mine any higher than the default 2.66Ghz without stability issues. I am running an Intel Bad Axe 2 board with 4GB of Corsair Dominator 8500. I get can my machine to boot into Windows at 3.2, and it appears to be P95 and Orthos stable, but if I try to do any gaming or work with 3DSMax I get random nv4disp.dll BSOD's. I was running the default 1.35V, as with any thing higher my CPU temps instantly jump to well over 90C with my Tuniq Tower.

Some weekend I am going to try reseating my heatsink and see if I can get it to at least 3Ghz with slightly more voltage.
That not your qx6700 you'll be glad to hear, that's your graphics card causing problems(nv4disp.dll). What graphics card are you using?

I've had similar issues with my 8800 gtx and applications like lightwave.

Two things. Firstly with ntune or rivatuner, setting the fan speed to 85-90%, instead of auto. I found helped a lot. Suggesting to me that these BSOD are in part temperature related.

Secondly you need to possibly look at global settings for your card(3d Applications), and see if you can find the best configuration for it. In addition I believe that people have more joy with max if the viewport is set to directx, rather than opengl.

I'm presuming that you have something like an 8800 GTX or GTS?

RLM