Intel Xeon 6 Core E5-2620 2.0 GHz 15MB 1333 MHz 95W, 1x8GB, 300GB 10K 2.5" HS SAS, SR-M1115, 550W   Model System x3550-M4  Code 7914C2A Memory 1x8GB  Hardisk 300GB 15K 3.5" HS SAS Power Supply 550 watt Optical Drive No optical Processor Intel Xeon 6 Core E5-2620 2.0 GHz 15MB 1333 MHz 95W Port Up to eight USB (2.0) Slot One PCIe 3.0 x16 slot half length / One PCIe 3.0 x8 slots optional PCI-X or PCIe x16