I've been using 7 for 2 days now, great FPS in Crysis, FC2, CoD4, CoDWaW, and it looks and runs great, right now my CPU load is 2% and im running quite a few apps and playing a video podcast in Itunes, probably not impressive, but it is to me moving from a P4 with 1gb ram, keep in mind I haven't tried Vista 64, so I have nothing to compare to.