From what I've gathered both 360 and ps3 used nvidia and both said the deal was sour. I don't know the details, or even if they're correct, but apparently nvida was a big mistake for both sony and ms this past gen. It's no wonder they didn't go with nvidia, sadly. I've always liked nvidia and thought amd made a mistake by buying ati, but hopefully things turn around for them.
The first pc I built was amd. Best of luck to them on this venture.









