Windows 7 - Power Failure?

I have a Shapphire HD 6870 that i just bought it ran perfectly for days until today when i tried to play black ops my game froze and went black. I tried to start up my computer but it never started up and i can hear my gpu fan turning on and off. I plugged in my old 4670 and same problem. My friend had kind of a similar problem that happened to him with hes sli 260's and the problem was hes motherboard. Could it be my ASUS M4A79XTD EVO motherboard thats causing the problem? Or my lowly RAIDMAX 530w that is crossfire and sli enabled. If you need anymore information about my specs or anything else just say.

UPDATE - I submitted a support ticket to SAPPHIRE so i can see what they say also.

530W is too low for that card, to run anything high end I recommend 650W minimum also, if you want to run Xfire you will need 750W at least. Is there another machine you can test the card in? It sounds as though the card has caused a power surge and may have damaged it.