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 Q170 PCH-H Vpro Processors : Intel Core i5 6th Gen Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 - 2133 Hard Drive : SSD-PCIe,G2 SSD-PCIe, Sata 7.200rpm or SSD or SSHD Removable Media : HP 9.5mm Slim Desktop DVD-ROM ODD/DVDRW/BDXL Blu-Ray Drive Expansion Bays : External: One (1) 9mm Slim ODD Internal: Two (2) 3.5inch, One (1) 2.5inch Expansion Slots : Two (2) PCIe x1 v3.0, Two (2) PCIe x16 v3.0, Graphics : Intel HD Graphics Audio : HD audio with Realtek ALC221 codec Communications : Intel  I219LM Gigabit Ethernet Port I/O Ports : Front: Two (2) USB 2.0 (one includes fast charging), Two (2) USB 3.0, Audio I/O Rear: Six (6) USB 3.0, VGA, Two (2) DP, RJ-45, PS/2, Serial, Audio I/O Power : 200W Dimensions : 37.9 x 33.8 x 10 cm Weight : 7.6 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q170 PCH-H Vpro Processors : Intel Core i5 6th Gen Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 - 2133 Hard Drive : SSD-PCIe,G2 SSD-PCIe, Sata 7.200rpm or SSD or SSHD Removable Media : HP 9.5mm Slim Desktop DVD-ROM ODD/DVDRW/BDXL Blu-Ray Drive Expansion Bays : External: One (1) 9mm Slim ODD Internal: Two (2) 3.5inch, One (1) 2.5inch Expansion Slots : Two (2) PCIe x1 v3.0, Two (2) PCIe x16 v3.0, Graphics : Intel HD Graphics Audio : HD audio with Realtek ALC221 codec Communications : Intel  I219LM Gigabit Ethernet Port I/O Ports : Front: Two (2) USB 2.0 (one includes fast charging), Two (2) USB 3.0, Audio I/O Rear: Six (6) USB 3.0, VGA, Two (2) DP, RJ-45, PS/2, Serial, Audio I/O Power : 200W Dimensions : 37.9 x 33.8 x 10 cm Weight : 7.6 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q150 Processors : Intel 6th generation Core i7, i5, i3, Pentium G Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 2133 MHz SDRAM  Hard Drive : SATA III HDD or SSD, M.2 SSD Removable Media : (optional) DVD-ROM, DVD Super Multi, BD Triple Writer SATA slim (tray) 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-e 3.0 x16, One (1) LP PCI-e 2.0 x4, Two (2) LP PCI-e 2.0 x1 Graphics : Intel HD Graphics Audio : Realtek ALC671 Communications : 10/100/1,000 MBit/s Intel I219V I/O Ports : Front: Two (2) USB 2.0, Two (2) USB 3.0 microphone, headphone  Rear: Two (2) USB 2.0, Four (4) USB 3.0, Two (2) DisplayPort, DVI-D, Audio I/O Power : 280 watts 84% active PFC Dimensions : 332 x 338 x 89 mm Weight : 8 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q43 Processors : Intel Core 2 Quad, Core 2 Duo, Pentium, Celeron Memory Support : Four (4) DIMMs. Up to 16 GB DDR3 1066 MHz Hard Drive : Sata 6Gb/s 7.200 rpm Up to 1TB Removable Media : DVD-ROM/ DVD-ReWritable Expansion Bays : External : One (1) 5.25-inch, One (1) 3.5-Inch Internal: One (1) 3.5-inch Expansion Slots : One (1) PCIe 2.0 x16 LP, One (1) PCIe x4(mech x8) LP, Two (2) PCI 32-bit/33MHz Graphics : Intel GMA 4500 Audio : Realtek ALC663 Communications : Gigabit Ethernet , Intel 82567 LF I/O Ports : Front: Two (2) USB 2.0, Audio I/O, Rear: Six (6) USB 2.0, VGA, RJ-45, Two (2) Serial, PS/2, Audio I/O Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 250W Dimensions : 38 x 34 x 10 cm Weight : 10 kg

Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: AMD B350 FCH Processors: AMD PRO A8 Series, AMD PRO A10 Series, AMD Ryzen 3 PRO, AMD Ryzen 5 PRO Memory Support: Four (4) DIMM slots ,64 GB DDR4, Up to 2666 MT/s Hard Drive: HDD or SSD Removable Media: DVD-ROM/ DVD-ReWritable, Slim Line (Optional) Expansion Bays : Internal: Two (2) 6.35 cm (2.5 in), One (1) 8.89 cm (3.5 in), Eternal: One (1) 0.9 cm (0.35 in) Slim optical disc drive (ODD) Expansion Slots : One (1) PCI Express x1 LP, One (1) PCI Express x16 LP, One (1) M.2 PCIe x1 2230, One (1) M.2 PCIe x2 2280/2230 Graphics : Integrated Audio : Conexant CX20632 Communications : Realtek RTL8111EPH I/O Ports : Front: 1 headset connector; 1 USB 2.0; 1 USB 2.0 (fast charging); 1 USB Type-C? (charging); 2 USB 3.1 Gen 1,Rear: 1 audio-in; 1 audio-out; 1 power connector; 1 RJ-45; 1 serial and PS/2 ports combination; 2 DisplayPort? 1.2; 2 USB 3.1 Gen 1; 4 USB 2.0 Power : 180 W active PFC Dimensions : 9.4 x 29.7 x 26.9 cm Weight : 4.5 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-LM E GbE Network Connection I/O Ports : 10 External USB - 6 x USB 3.1 Gen 1 (1 USB Type-C for data only and 1 Type-A front/4 Type-A rear) and 4 x USB 2.0 (2 Type-A front/2 Type-A rear - 1 front with PowerShare); 4 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 7 Home & Pro. MAR, Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q170 Chipset Processors : Intel Pentium and Intel Core™ i3, Intel Core i5, and Intel Core i7 6th Gen Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 2133 UDIMM Hard Drive : SATA 6.0Gb/s, 2.5"/ 3.5" wide, 5400 / 7200 rpm, Solid State Hybrid Drive (SSHD), Solid State Drive (SSD), M2 Removable Media : Optional 9-in-1 media reader, DVD-ROM SATA or Multi DVD-RW Expansion Bays : External: One (1) 9.5mm high, Internal: One (1) 3.5-inch, One (1) 2.5-inch Expansion Slots : One (1) PCI-e (LP) 3.0 x16, One (1) PCI-e (LP) 3.0 x1, One (1) PCI-e (LP) 3.0 x4 Graphics : Intel HD Graphics 510/530 Audio : High Definition (HD) Audio, Realtek ALC662 Communications : Gigabit ethernet, Intel Ethernet Connection I219-LM I/O Ports : Front: Two (2) USB 3.0, Audio I/O Rear: Six (6) USB 3.0, Audio I/O, Serial, VGA, Two (2) DP Input Devices : Preferred Pro USB Keyboard (USB connector), Lenovo logo Enhanced Optical USB Mouse, black, Lenovo logo Power : 210 watts, autosensing, 85% PSU Dimensions : 338mm X 357mm X 88mm Weight : 12.3 lb (5.6 kg)