Tower

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

Operating System : Windows 10 Home & Pro MAR
Chipset : Intel Q77
Processors : Intel 2nd & 3rd Generation Core i7, i5, i3, Pentium, Celeron Processors
Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 1600 MHz SDRAM 
Hard Drive : Up to 1 TB , 64GB to 1TB Solid State Drive (optional)
Removable Media : SATA DVD-ROM drive, SATA DVD Writer Drive, SATA Blu-ray Writer Drive
Expansion Bays : External: Two (2) 5.25-inch, Internal: Two (2) 3.5-inch
Expansion Slots : One (1) PCIe x16, One (1) PCIe x16 (wired x4), One (1) PCIe x1, One (1) PCI
Graphics : Integrated Intel® HD Graphics 2500/4000 (3rd G), 2000/3000 (2nd G)
Audio : Realtek ALC269Q High Definition Audio Codec
Communications : Intel 82579LM Gigabit Ethernet LAN 10/100/1000
I/O Ports : Front: Four (4) USB, microphone, headphone, Rear: Six (6) USB, VGA, Serial, DP, RJ-45, PS/2 Stereo L/I, Speakers L/O
Input Devices : Dell USB Entry Keyboard, Dell USB Multimedia Pro Keyboard, Dell USB Entry Optical Mouse, Dell Laser Mouse
Power : 275W
Dimensions : 41.7 χ 36 x 17.5 cm
Weight : 9.4 kg

Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS
Chipset: Intel Q170
Processors: Intel 6th & 7th generation Core i5-i7 Quad Core, Core i3 Dual Core
Memory Support: Four (4) DIMM slots , DDR3 Up to 16 GB 1600 MHz
Hard Drive : Up to 2 TB or SSD (optional) SATA, M.2 SSD (Optional)
Removable Media : DVD-ROM/ DVD-ReWritable slim (optional), Card reader (optional)
Expansion Bays : 1 (total) / 0 (free) x external 5.25″ Slim Line, 1 (total) / 0 (free) x internal 2 x 2.5″/3.5″ shared
Expansion Slots : 2 x PCIe x16, 1 x PCIe x1, 1 x PCI, 1 M.2
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 3.0 (2 front/4 rear) and 4 x 2.0 (2 front/2 rear – 1 front with PowerShare); 1 Internal USB 2.0; 1 RJ-45; 1 Serial; 2 Display Port 1.2; 1 HDMI 1.4; 2 PS/2; 1 UAJ, 1 Line-out;
Power : 240 W
Dimensions : 35 x 15.4 x 27.4 cm
Weight : 7.93 kg