I know I made a post earlier about this and now I've got a bit more info about the crashing. my current settings on crysis are 1680x1050 with no AA and Vsync enabled, as well as all the graphics are on High. The Game literally runs almost perfect for a good while and then out of nowhere it just freezes. Either it freezes to where I have to hold down the reset button or it just freezes and I can use task manager to close the program (this is more commonly the case). I've checked my CPU temp and it says that I'm only running at 50 degrees C (idle its usually 40 degrees C) which isnt hot enough to crash, and my power suppy isnt just shutting off so I don't think its that. My assumption would be that its a software issue but I'm not sure. If you can help me fix this issue that would be AWSOME!!!
my specs
700W Rocketfish 12VATX PSU
ASRock A780GXE/128M
1TB WD 7200rpm 32MB cache w/ additional 500GB WD 7200rpm hard drive
Crossfire 2 XFX HD4850 512MB
Phenom II X4 940 3.0Ghz w/ Thermaltake SpinQ heatsink
8.00GB Corsair DDR2 800
3 x 120MM fans
1 Samsung DVD/RW x24 and 1 Sony DVD/RW x24
Doesn't seem to be a hardware issue since your psu and cpu don't give you problems anywhere else, my best advice would be to try and tinker with the settings and see whether the problem persists,reduce some of the settings to medium, at that resolution the 4850 should be able to handle stuff on high no problem and also try and see if you got anything else running in the back ground that might cause problems but i don't see why the game is giving you problems like that does it only happen when you play it or has it happened in other instances?
Could just be that Crysis is pushing the GPU harder than anything else? What are your GPU temps like? If your cards are too close together one might try to throttle and they crash because they're running at different speeds? Stab in the dark. Also, how much power has your PSU got on the 12v rail(s). (if multiple rails look for a combined figure rather than adding two individual rail figures together)
You might be right about the GPU's cause the XFX cards are freaking huge and there almost pretty much touching each other. the only thing pussing them apart is the little screw that sticks out that I believe is for keeping them seperated.