Nvidia is DOMINATING every part of the market now. ATI's only hope is their new line of DX10 cards and if they are like the high end of the X1k series then its going to fail dismally. Nvidia's budget to mid range lineup uses less power and performs better than their ATI counterpart. Take the 7600GT and X1650Xt for example. the 7600GT sports a puny heatsink and fan and doesn't require an external power supply, while the X1650XT is slower and dons a HUGE copper heatsink and requires external power. Just from the amount of heat generated, I would choose Nvidia over Ati.