1 x Quad Core Intel® Xeon® E5520 (2.26GHz) Processor (8MB L3 cache, 80W, DDR3-1066, HT, Turbo 1/1/2/2) Intel® 5500 Server Chipset with 2 Processors Support 4GB (2 x 2GB) PC3-10600E DDR3-1333 Unbuffered ECC DIMMs Support up to 8 LFF 3.5” Hard Drives (with Optional Drive Cage) HP Smart Array P410i/256MB Controller (RAID 0/1/1+0/5) HP 16x DVD-ROM Drive; No Floppy Drive Integrated HP NC107i PCI Express Gigabit NIC 32MB Shared Video Supporting 1600x1200x16M Resolution 5 Expansion Slots (1 PCI Slot and 4 PCI-Express Slots) Supports Windows, RHEL, SLES and XenServer (Retail) 460Watts Non-Hot Plug Power Supply; 2 x System Fans HP Standard Keyboard; HP PS/2 Scroll Mouse Dimensions: 7.87 x 16.81 x 24.13 in; Weight: 16 kg min. 5U Tower Form Factor 3 Years Manufacturer Limited Warranty