And I'd start looking at his psu..

I just had my Xigmatek pc502 shut down on me gaming with the GTX 560 non Ti..

TS,

Sorry to barge in here but just to explain..

Goldfries,

you're right but this Xigmatek NRP PC502 500W is pushing 4years old.
It's ok with the Galaxy GTX460 and lower powered, but when I swapped in the EVGA GTX 560 it shuts down a few minutes after loading any games like COD4 / DOTA 2.

I'm switched out the GTX 560 and now using a HD 5750 and it's behaving itself running no problems with games so I guess the gtx 560 is triggering the overload protection..
I'm surprised as well..gonna relegate it to my 2nd pc.

I ordered a Super Flower Golden Green HX600M rated 80+ gold.. The name gives me that made in china low cost quality feeling but reviews are good and gold is better than bronze..