Up to 1TB 7200 rpm

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS
Chipset : Intel H81
Processors : Intel 4th generation Core i5, i3 Dual Core, Intel Pentium, Intel Celeron
Memory Support : Two (2) DIMM slots, up to 16GB DDR3
Hard Drive : Up to 1TB 7200 rpm
Removable Media : DVD-ROM/ DVD-ReWritable
Expansion Bays : 1 internal 3.5″, 1 external 5.25″ (slimline)
Expansion Slots : 1 half height PCIe x16, 1 half height PCIe x1
Graphics : Integrated Intel HD Graphics 4600
Audio : N/A
Communications : Integrated Realtek RTL8151GD GbE Network Connection
I/O Ports : 2 external USB 3.0 ports (rear) and 6 external USB 2.0 ports (2 front,
4 rear); 1 Serial port (optional); 1 PS/2 (optional); 1 RJ-45; 1 VGA;
1 DisplayPort 1.2; 1 Mic-in & 1 Headphone out (front);
1 Mic-in/Line-in & 1 Line-out(rear)
Power : Standard 255W PSU Active PFC or optional 255W up to 90% Efficient
Dimensions : 31.2 x 29 x 9.3 cm
Weight : 6 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS
Chipset : Intel Q85
Processors : Intel 4th Gen Core i3,i5,i7, Intel Pentium, Intel Celeron
Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 SDRAM, 1600MHz 
Hard Drive : Up to 1TB 7200 rpm
Removable Media : DVD-ROM/ DVD-ReWritable (slim)
Expansion Bays : External: One (1) 3.5-inch Internal: One (1) 3.5-inch, One (1) 2.5-inch
Expansion Slots : One (1) LP PCI Express x16s, Three (3) LP PCI Express x1
Graphics : Intel HD Graphics
Audio : Realtek ALC221 codec
Communications : Intel I217LM GbE Network Connection
I/O Ports : Front: Two (2) USB 3.0, Two (2) USB 2.0, Audio I/O, Rear: Two (2) USB 3.0, Two (2) USB 2.0, VGA, DP, Audio I/O
Input Devices : Standard Keyboard (USB)
Power : 240 W
Dimensions : 38.05 cm x 33.7 cm x 10 cm
Weight : 7.6 kg