XFX 780i SLI MoBo
Intel C2D E8500 OC'd to 4.259 Ghz
4 gigs of Mushkin 1 gig sticks 825 Mhz 4-4-3-10
2x GeForce 8800 GTX's OC'd to 632/2015
Antec CP-850 PSU
Completely air cooled and super quiet, running 4 instances of F@H (2 GPU, 2 CPU, + a PS3) about 16 hours per day, 24 hours for the PS3.