Also how old is the psu, if its older then 2 years i would just upgrade it, since more then likely it will die after a time. Yeah you take a chance of blowing your power supply, but that honestly wont happen unless its a. hella old, or b. very very dusty. I suspect if your going to have issues with the psu, it will just cause the card to crash due to a lack of power, not the psu itself. Honestly though, your psu is probably the one place where everyone wants to cheap out but really shouldnt. If your totally stuck on trying it though, give it a whirl.