Operating System :Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset :Intel C602 Processors :Intel Xeon E5-2600 Series, Intel Xeon E5-2600 v2 Series Memory Support :16 slots (8 slots per CPU), 3-channel DDR3, RDIMM or UDIMM, ECC, LR DIMMs,1066/1333/1600 MT/s Hard Drive :250GB to 3TB SATA 3.0-Gb/s, 300GB to 1.2TB SAS, 128GB to 1TB SSD Drives Removable Media :16X DVD-ROM SATA Drive, 16X DVD+/-RW SuperMulti SATA Drive, Blu-ray Writer Expansion Bays :External: Three (3) 5.25-inch, Internal: Four (4) 3.5-inch Expansion Slots :3 PCIe x16 Gen3 Slots (3rd on 2nd CPU), PCIe x16 (x8)(on 2nd CPU), 1 PCIe x8(x4), 1 PCIe x8(x4), 1 PCI Slot Graphics :N/A Audio :Integrated Intel/Realtek HD ALC262 Audio Communications :Integrated Intel 82579LM PCIe GbE Controller I/O Ports :Front: 1 USB 2.0, 2 USB 3.0, Headphone/Mic, Rear: 4 USB 2.0, 2 USB 3.0, 2 PS2, 1 Serial, Audio I/O Input Devices :Standard Keyboard (USB or PS/2) Mouse (USB or PS/2) Power :Choice of 850W Dimensions :44.4 x 20.3 x 52.5 cm Weight :21 kg

Operating System :Windows 7 Home & Pro. MAR, Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset :Intel® 5400 Processors :Quad-Core Intel® Xeon? Processor 5400 or Dual-Core Intel® Xeon? Processor 5200 Memory Support :Eight (8) DIMM slots DDR2-667MHz FB-DIMM. Up to 32 GB Memory capacity Hard Drive :80GB to 1TB SATA 3.0-Gb/s, 73GB to 450GB SAS Drives Removable Media :16X DVD-ROM Drive, SATA 48X CD-RW/DVD-ROM Combo Drive, SuperMulti DVD+/-RW LightScribe Drive Expansion Bays :External: Two (2) 5.25-inch, One (1) 3.5-inch, Internal: Two (2) 3.5-inch Expansion Slots :2 PCI Express x16 Gen2 Graphics Bus, 2 PCI, 2 PCI Express x8 (x4) Graphics :N/A Audio :High Definition Integrated Realtek ALC262 Audio Communications :Integrated Broadcom 5755 Gigabit LAN I/O Ports :Front: Two (2) USB 2.0, Headphone/Mic, Rear: Five (5) USB 2.0, 2 PS2, Serial, Audio I/O Input Devices :Standard Keyboard (USB or PS/2) Mouse (USB or PS/2) Power :650 watt 80 PLUS high efficiency power supply Dimensions :N/A Weight :N/A

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q85 Express Processors : Intel 4th Gen Core i5 Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 SDRAM , 1600MHz Hard Drive : Up to 1TB 7200rpm Removable Media : DVD-ROM/ DVD-ReWritable (slim) Expansion Bays : External: One (1) 5.25-inch, One (1) 3.5-inch, Internal: Two (2) 3.5-inch, One (1) 2.5-inch Expansion Slots : One (1) PCI Express x16, Three (3) PCI Express x1 Graphics : Intel HD Graphics Audio : Realtek ALC221 codec Communications : Intel I217LM GbE Network Connection I/O Ports : Front: 2 USB 3.0, 2 USB 2.0, Audio I/O, Rear: 2 USB 3.0, 4 USB 2.0, VGA, DP, RJ-45, Audio I/O,PS/2 Input Devices : Standard Keyboard (USB or PS/2) Power : 320 W Dimensions : 44.2 cm x 39.9 cm x 17 cm Weight : 9.3 kg