If you’ve read the review of Nividia’s GeForce GTX 295 card on cnet.com, you might be able to guess our assessment of this overclocked, Asus-packaged version of AMD’s ATI Radeon HD4870X2. Simply, for $550–$50 more than the Nvidia card–the amped up Radeon card gives you less performance and uses more power along the way. The only solace we can offer for AMD is that this card has a minor (borderline irrelevant) software support advantage, and a mildly easier setup process. Whether you value those features or not, the primary reason for purchasing an expensive 3D card is speed. And in the high-end price range, the Radeon EDHD4870X2 …