OS x 10.8.2 installed successfully. Dell c6100 node, Antec 1200 case, Modxstream-pro 500W PSU (with modified 12pin cable), GeForce 9800 GT 1 Gig video (PCIe ribbon), QVS USB to 2.1 Stereo Audio, Samsung 840 Pro SSD, 1Gig Nic (only one working), 2x24" Hp LP2475w.
Xbench score 209, Geekbench...