Operating System :Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset :Intel C216 Processors :Intel Xeon processor E3 v2 family, 3rd gen Intel Core processors, Dual-Core Intel Pentium processors Memory Support :4 DIMM slots, supporting up to 32GB ECC/non-ECC, DDR3 1600 MT/s Hard Drive :250GB to 2TB SATA 3.0-Gb/s, 128GB to 512GB SSD Drives Removable Media :16X DVD-ROM SATA Drive, 16X DVD+/-RW SuperMulti SATA Drive, Blu-ray Writer Expansion Bays :External: One (1) 5.25-inch, One (1) 3.5-inch, Internal: One (1) 3.5-inch Expansion Slots :1 PCI Express slot x1 (LP), 1 PCI Express slot x16 (LP), 1 PCI Express slot x16 (x4) (LP), 1 PCI slot (LP) Graphics :Intel Integrated Graphics Media Accelerator HD Audio :Integrated Realtek HD ALC221 Audio Communications :Integrated Intel 82579LM PCIe GbE Controller I/O Ports :Front: 4 USB 2.0, Headphone/Mic, Rear: 4 USB 3.0, 2 USB 2.0, 2 PS2, Serial, Audio I/O, DVI-I, DP Input Devices :Standard Keyboard (USB or PS/2), Mouse (USB or PS/2) Power :240 W Dimensions :38.1 x 33.1 x 10 cm Weight :7.6 kg