mm... strange, my brother have a similar computer than me, C2Q 2.83ghz 8GB ram, windows 7 x64 (i ran a quad 771 xeon 2.5ghz), and i dont see much difference when i do web browsing compared to XP in my computer, at least in some heavy web sites like youtube, github, etc, other websites, like goberment stuff, bank, etc we use a lot are exactly same