Hey, I just purchased the evga 6600gt about 3 weeks ago and i had a 250w psu. I knew that this probably would not work, but I installed the card with the psu and it did not work very good at all, but it DID work. Thinking my problem was the power supply or the lack there of, i went to best buy and purchased an antec 350w smart power. Well, i came home and installed it, stuck my card in and turned it on, or atleast tried. everything had power but it would not even post. after trying to re hook the psu it did the same thing. It wouldnt even show the bios. So i took the card out and tried to boot it up, and it booted rite up. can some one please help me here, and my computer is an emcahines for further info PLEASE HELP ME! thanks