I multi box 5 wow accounts on full gfx settings.

dell xps m1730 x9000 CPU oc to 3.4 ghz 4 gigs of ram dual 200gig 7200 RPM hd in raid 0

dual 8800gtx graphics cards non SLI mode ( if SLI is turned on my FPS takes a HUGE HIT)

I use Keyclone