One thing you didn't mention: AMD drivers tend to not be as good as nvidia's. In games nvidia drivers tend to be better, and AMD's catalyst control panel takes FOREVER to load on my spare machine (ok, it's only an amd e350 netbook, but still...), while the nvidia one on my main system doesn't (though it has a quad-core i5 CPU). Guess what? Since I'm ready to upgrade my main pc's graphics card, I'm looking into nvidia for that reason. Sure an AMD 6770 may be a bit cheaper than an nvidia 550ti, but it also offers slightly worse performance (just a tad), plus the drivers, and I found better card brands with nvidia.