I got a
AMD Athlon 64 3800+
2 Gig of Ram (Use to have 1 gig)
250GB hardrive (190)GB Free
Before, When I had XP I ran high demanding Applications such as Medieval 2 Total War with maxed out setting no problem. Then I bought Vista Home Premium and got stutters and had to turn down my graphics to get reasonable FPS. And Yes I disabled Aero, and other things needed to improve performance.
Vista Made me lose about 25-40 % peformance with high demanding applications. Of course Browsing the Net and watching DVD was no problem on Vista... But if your a avid gamer like me it sucks. Takes 512 memory just to run vista, only leaving 50% Free.
Of course there are those people that say vista is awsome and it improves performance.
Its been proven that vista doesnt come close to the Benchmark of XP when running High demanding Applications.