Memory: Maximum 16G Color:black Size: 29.5x19cm/11.61x7.5in Memory type: DDR4 Frequency:2133/2400/2800/3000 MHZ Memory slot: 2×DDR4 Expansion slot: 1×PCI-E X16 graphics slot 11×PCI-E X1 graphics slot 2x USB2.0 pins 1x USB3.0 pin 1x COM pin 2x4p square power port 4xSATA3.0 port I/O port: PS/2 port keyboard and mouse universal port 2 1×RJ45 network port 1×DVI High Definition output 2xUSB 3.0 port,4xUSB 2.0 port 1 VGA