Hey guys,

I got my overclock on my Core i7 930 stable awhile back for 24+ hours in Prime 95. Memory has passed a 8+ hour test on MemTest86+. I'm going to be doing LinX next.

The overclock was stable for a very long time and I never got any blue screens until I started folding with my GTX 470. It didn't occur to me until now that it only blue screens on me ("MACHINE_CHECK_ERROR") or hard freezes (cursor stuck in place, nothing will respond, have to power off) when I'm GPU and CPU folding simultaneously.

Now, the CPU overclock seems stable. The memory seems stable. The videocard is stable as well as far as I can tell, as it no longer restarts the driver.

My only thoughts are: Are there motherboard BIOS settings I need to change for the videocard overclock to stop this? I'm moderately overclocking my GTX 470 to 700mhz GPU/1400mhz shader and about 1275mhz on the memory clock (forget what it's set to atm, I'm at work, but I'm 99% sure that's correct). It runs all my games fine.

The other possibility is that my power supply isn't providing enough power when I'm stressing both the CPU and GPU at near 100% simultaneously. I'm running all that as well as 7 120mm case fans and a 200mm case fan, two hard drives, a solid state drive, and an optical drive on that 850W.

Temps are well within acceptable limits. None of the CPU cores ever gets above 70*C. The GPU stays around 75* C while folding. I have very good case cooling.

Here's my specs:
-Antec 9000 Case
-Intel Core i7 930 @ 3.8GHZ
-12GB (actually usable, yay!) OCZ 1600MHZ DDR3 @ 8-8-8-24 (stock timings)
-EVGA E758-A1 Motherboard
-EVGA GTX 470 @ 700/1275/1400
-Antec 850W True Power (TPQ850)

Any help would be appreciated.

Have you ever overclocked your videocard and did you need to change any settings on the motherboard? I raised the voltage up to 1.062 and it's been stable in games with zero artifacting and it no longer has driver crashes where it clocks back down to stock speeds.

Thanks! I'll give that a shot. :)