Unreal 3 Shuts PC off

[dariuas]

So my current i7 build (920) is over clocked to 3.6, running really decent, everything runs nicely except for Unreal Tournament 3.
I can play it on stock settings, and mid-way, maybe 10 minutes in to the game, it shuts my PC off; no error message, nothing shows up in event manager
just shuts off.
I have the Radeon 4870x2 card on an Asus P6T Deluxe board.

Any suggestions?

 

[ill b ben]

I'd say heat or your psu

check your temps with core temp and run something like prime to make it sweat.

Or because you overclocked your cpu you draw to much power from your pc. although in my experience i would get a bsod but to b sure what psu r you running this on?