i bought my hd 5770 but i had a crappy 450 generic psu, but that was only in for about a week until i got some money and went out to centrecom to buy a new psu.. i wanted a thermaltake 600w (they had it 72 bucks) but when i asked for it they where out of stock and the guy convinced me to get this psu called 'master 650 WT' which cost me $90. It looked quite professional and since it was expensive i thought it was an alright psu.. but it turns out its a crappy generic psu with only 26A on the 12v rails and my computer still crashes because of it... and now i got no money
i was thinking of purposely breaking it or blowing it up and then take it back to the shop for a refund and say it just happened... haha