Silverstone 600w psu
4gb ram, possibly elixir (2x2gb)
intel motherboard, dont know which one (not a top of the range one)
Intel Core 2 Duo E8500, S775, Wolfdale 45nm, 3.16 GHz
win 7 (upgrade over win xp, not clean install)
You can't upgrade XP to 7, so I'm not quite sure how you managed that. What steps did you follow when doing this?