Operating System :Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset :Intel C602 Processors :Intel Xeon E5-2600, Intel Xeon E5-2600 v2, Intel Xeon E5-1600, Intel Xeon E5-1600 v2 Memory Support :12 DIMM Slots for DDR3 ECC, 4-channel per processor 1066/1333/1600/1866 MHz DDR3, Up to 192GB Hard Drive :250GB to 3TB SATA 3.0-Gb/s, 300GB to 1.2TB SAS, 128GB to 512GB SSD Drives Removable Media :DVD-ROM/ DVD-ReWritable Expansion Bays :External: Two (2) 5.25-inch, Internal: Three (3) 3.5-inch Expansion Slots :2 PCIe x16 Gen3 Slots, 1 PCIe x8 Gen3, 1 PCIe x8(x4) Gen2, 1 PCIe x4(x1) Gen2, 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, Audio I/O Input Devices :Standard Keyboard (USB or PS/2) Mouse (USB or PS/2) Power :800W Dimensions :44.45 x 17.15 x 46.48 cm Weight :17.9 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Gemini Lake Processors : Intel Gemini Lake Pentium Quad Core Memory Support : Two (2) SODIMM slots, up to 8GB DDR4 SODIMM (2133/2400 MHz) Hard Drive : SATA SSD M.2 Removable Media : N/A Expansion Bays : N/A Expansion Slots : RJ45/SFP/VGA, PCIe slot Graphics : Intel UHD Graphics 605 Audio : Realtek ALC3253 and Intel Communications : 10/100/1000 Mb/s Ethernet I/O Ports : 7 x USB ports (three front, four rear), 1 x USB Type-C port, 1 x RJ45, 2 x headset/mic combo jacks, 1 x headphone jack, 2 x DP, 1 x DP without audio Power : 130 W Dimensions : 18.4 cm x 18.4 cm x 6.6 cm Weight : 1.47 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset :Intel Q67 Express Chipset Processors :Intel Core i7 2nd Gen Memory Support :Four (4) DIMM slots , Up to 16 GB DDR3 SDRAM  Hard Drive :SATA 6.0Gb/s 7200 rpm Removable Media :Super Multi-Burner DL DVD±RW SATA Expansion Bays :External: One (1) 5.25-inch, One (1) 3.5-inch, Internal: One (1) 3.5-inch Expansion Slots :One (1) LP PCI Express x16, One (1) LP 32-bit PCI 2.3, One (1) LP PCI Express x1 Graphics :Intel HD Graphics in processor Audio :High De?nition (HD) Audio, Realtek? ALC662 codec Communications :Gigabit ethernet port, Intel 82579 I/O Ports :Front: Two (2) USB, microphone, headphone  Rear: Six (6) USB, Stereo LI, Speakers LO, VGA, DP Input Devices :Pro USB Keyboard (USB connector), 104-key, black, Lenovo? logo Enhanced Optical USB Mouse, 1000 dpi, black, Lenovo logo Power :240 watts, autosensing, 85% PSU Dimensions :337mm W X 369mm D X 99mm H (13.3" W X 14.5" D X 3.9" H in) Weight :7.5 kg (16.5 lb)