DELL XPDFK Precision Workstation T3500 Motherboard; Supported Processors: Intel Xeon 6-Core (X5670, X5650), Intel Xeon Quad Core (W3550, W3565, W3530, E5640, E5630, E5507), Intel Xeon Dual Core (W3505, W3503), Intel Xeon (W3680)