Ickle Problemo :s

[Calneon]

Sounds very much like a PSU problem. I get the same 'GPU blacking out' when I overclock my 560Ti too much and then run Furmark or something. Mine is a Corsair 520W, so it makes sense that overclocking too much would put it past the capacity, 600W should be fine but it's probably a shitty PSU (like Mitch tells everyone to buy), and it's crapped out. Replace ASAP before it damages something.

[Colonel Mitch]

Sounds very much like a PSU problem. I get the same 'GPU blacking out' when I overclock my 560Ti too much and then run Furmark or something. Mine is a Corsair 520W, so it makes sense that overclocking too much would put it past the capacity, 600W should be fine but it's probably a shitty PSU (like Mitch tells everyone to buy), and it's crapped out. Replace ASAP before it damages something.

I didnt tell chris to get the one he has it was put in by a computer shop :P

You new GPU wont b overheating, CPU could be but it does sound like your out of power