You guys are lame... My PC is like the millenium falcon.
I'm using this: http://www.expertreviews.co.uk/pcs/243882/packard-bell-imedia-2426
With a 500W PSU and a 1GB Sapphire HD 4670, it can run crysis on high

, newer games on medium/high. I really want a DX11 capable PC at some point.
It has half an operating system after a rootkit devastated it a month or so ago meaning I can no longer play Civ V or Vampire the Masquerade as well as a few other games. Windows defender, MSE and lots of other fun stuff no longer works. But as long as it runs I'll use it.