Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q57 Express Processors : Intel Core i3,i5,i7 1st Gen, Intel Pentium Memory Support : Four (4) DIMM slots , Up to 16 GB DDR3 1333 MHz SDRAM  Hard Drive : Up to 1 TB 7200rpm Removable Media : DVD-ROM/DVD Recordable Expansion Bays : External: One (1) 3.5-inch, One (1) 5.25-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) LP PCI, Two (2) LP PCI Express x16, One (1) LP PCI Express x1 Graphics : Intel Graphics Media Accelerator 4500 Audio : Realtek ALC261 codec Communications : Intel 82578 GbE Network Connection I/O Ports : Front: Four (4) USB, Audio I/O, Rear: Six (6) USB 2.0, VGA, DisplayPort, Serial, Two (2) PS/2, Audio I/O Input Devices : Standard Keyboard, Mouse (PS/2 or USB) Power : 240 W Dimensions : 37.85 cm x 33.8 cm x 10.0 cm Weight : 7.6 kg

Operating System : Windows 7 Home & Pro. MAR, Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel H110 Express Processors : Intel Core i3, i5, i7 6th & 7th Gen, Intel Pentium, Intel Celeron Memory Support : Up to 16 GB of dual-channel DDR4 2133 MHz Hard Drive : HDD, SSD Removable Media : N/A Expansion Bays : N/A Expansion Slots : PCI Express x16 slot, PCI Express x1 slot Graphics : Intel HD Graphics Audio : N/A Communications : Gigabit Ethernet I/O Ports : 4x USB 2.0, 6x USB 3.2 Gen 1 (3.1 Gen 1) Type-A, VGA, DVI, HDMI, RJ-45 Power : 220 W Dimensions : 392,1 x 267 x 100 mm Weight : 6 kg

Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q170 Processors: Intel 6th generation Core i5-i7 Quad Core, Core i3 Dual Core Memory Support: Four (4) DIMM slots , Up to 32 GB DDR4 Hard Drive : Up to 2 TB SATA, 7200rpm or SSD (optional) Removable Media : DVD-ROM/ DVD-ReWritable Expansion Bays : External: One (1) 5.25-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) PCIe x 4 HH, One (1) PCIe x 16 HH, One (1) M.2 3388 Graphics : Integrated Intel HD Graphics 530 Audio : Integrated Audio Communications : Integrated Intel i219-LM GbE Network Connection I/O Ports : Front: Two (2) USB 2.0, Two (2) USB 3.0, Cardreader (optional), Audio I/O Rear: Four(4) USB 3.0, Two (2) USB 2.0,Two (2) DP(optional), HDMI, VGA(optional), Serial, RJ-45, Audio I/O, PS/2 Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 240 W Dimensions : 29.2 x 29 x 9.26 cm Weight : 4.48 kg

Operating System : Windows 7 Home & Pro. MAR, Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel B250 Processors : Intel Core i3, i5 6th & 7th Gen, Intel Pentium, Intel Celeron Memory Support : Up to 64 GB DDR4 SDRAM Hard Drive : SSD Removable Media : N/A Expansion Bays : 1 external 5.25" x 1/2H, 1 internal 3.5" x 1/3H Expansion Slots : PCI Express x16 slot, PCI Express x1 slot Graphics : Intel HD Graphics 530 or 630 Audio : N/A Communications : Gigabit Ethernet I/O Ports : 4 x USB 2.0 (2 front, 2 rear), 6 x USB 3.0 (2 front, 4 rear), VGA, HDMI, DisplayPort, RJ-45, Microphone in, Headphone output, Serial port Power : 220 W Dimensions : 392,1 x 267 x 100 mm Weight : 6 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel H61 Processors : Intel Core i3,i5 2nd & Intel Core i3,i5,i7 3rd Gen. Intel Pentium, Intel Celeron Memory Support : Two (2) DIMM slots , Up to 16GB DDR3 1600MHz Hard Drive : SATA 3.0Gb/s 7200 rpm Removable Media : DVD-ROM/DVD Recordable Expansion Bays : External: One (1) 5.25-inch, One (1) 1.5-inch Internal: One (1) 3.5-inch Expansion Slots : Two (2) FH PCI-E x1, One (1) PCI x16 Graphics : Intel HD Graphics Audio : High Definition (HD) Audio, Realtek ALC662 codec Communications : Realtek RTL8111E GbE Network Connection I/O Ports : Front: Two (2) USB 2.0, Audio I/O, Rear: Four (4) USB 2.0, VGA, DVI, RJ-45, Audio I/O Power : 180W Dimensions : 38.2 x 33.6 x 10.1 cm Weight : 6 kg

Operating System : Windows 7 Home & Pro. MAR, Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel B250 Processors : Intel Core i3, i5 6th & 7th Gen, Intel Pentium, Intel Celeron Memory Support : Up to 64 GB DDR4 SDRAM Hard Drive : SSD Removable Media : N/A Expansion Bays : 1 external 5.25" x 1/2H, 1 internal 3.5" x 1/3H Expansion Slots : PCI Express x16 slot, PCI Express x1 slot Graphics : Intel HD Graphics 530 or 630 Audio : N/A Communications : Gigabit Ethernet I/O Ports : 4 x USB 2.0 (2 front, 2 rear), 6 x USB 3.0 (2 front, 4 rear), VGA, HDMI, DisplayPort, RJ-45, Microphone in, Headphone output, Serial port Power : 220 W Dimensions : 392,1 x 267 x 100 mm Weight : 6 kg

Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q270 Processors: Intel 6th & 7th generation Core i5-i7 Quad Core, Core i3 Dual Core Memory Support: Four (4) DIMM slots , DDR4 Up to 64 GB 2400 MHz Hard Drive : Up to 2 TB or SSD (optional) SATA or M.2 Removable Media : DVD-ROM/ DVD-ReWritable slim, Card reader (optional) Expansion Bays : External: One (1) slim, Internal: One (1) 3.5-inch Expansion Slots : One (1) PCIe x16 HH, One (1) PCIe x4 HH, One (1) M.2 2280 Graphics : Integrated Intel HD Graphics (depends on CPU) Audio : Integrated Audio Communications : Integrated Intel� i219-V Ethernet LAN 10/100/1000 I/O Ports : 10 External USB - 6 x 3.1 Gen 1 (2 Type-A front/4 Type-A rear), 4 x 2.0 (2 Type-A front/2 Type A rear - 1 front); 2 Internal USB 2.0; 1 RJ-45; 1 Serial; 2 Display Port 1.2; 1 HDMI 1.4; Input Devices : Standard Keyboard, Mouse Power : 180 W Dimensions : 29.0 x 9.26 x 29.2 cm Weight : 5.26 kg

Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel® B250 Chipset Processors : Intel 6th & 7th generation Core i7, i5, Core i3 Dual Core, Pentium Dual Core and Celeron Dual Core Memory Support : Two (2) DIMM slots , Up to 32 GB Non-ECC dual-channel 2400MHz DDR4 SDRAM  Hard Drive : Up to 2TB SATA or Solid State Drive (optional). M.2 Removable Media : SATA DVD-ROM drive, SATA DVD Writer Drive, SATA Blu-ray Writer Drive (SlimLine) Expansion Bays : Internal: One (1) 2.5-inch, One (1) 3.5-inch Expansion Slots : One (1) PCIe x16 Half Height, One (1) PCIe x1 Half Height Graphics : Integrated Intel HD Graphics 510/530 (6th Gen) or 610/630 (7th Gen) Audio : Integrated Audio Codec Communications : Integrated Realtek RTL8111H Ethernet LAN 10/100/1000 I/O Ports : Front: Two (2) USB 3.0, Two (2) USB 2.0, microphone, headphone, Rear: Two (2) USB 3.0, Two (2) USB 2.0, HDMI, DisplayPort, UAJ,RJ-45, Stereo L/I, Speakers L/O Power : 180W typical 85% Dimensions : 29.2 x 29 x 9.7 cm Weight : 5.14 kg