Xi MTower LE Slim Workstation - Intel H170 Chipset M/B, Intel i7-6700, 16GB DDR4 2133MHz, NVIDIA Quadro K620 Graphics, 250GB SSD, DVD-RW Drive, Windows 7 PRO 64-bit Intel Core i7-6700 3.4/4.0GHz-1C Turbo Boost 8MB Shared L3 Cache DMI 2.0 Quad-Core 6th Gen. 14nm NVIDIA Quadro K620 2GB LP Graphics card, 16GB DDR4 @2133MHz RAM 250GB Solid State Drive Samsung SATA 6Gb/s Microsoft Windows 7 PRO 64-bit Pre-installed Standard Features included: &#8212;&#8212; Intel H170 Express Chipset, &#8212; Dual Channel DDR3 Expandable up to 32GB 1600MHz, &#8212; Card Reader, &#8212; 3x USB 2.0, &#8212; 5x USB 3.0, &#8212; 1x HDMI, &#8212; &#8212; PCI-Ex16 3.0, &#8212; USB Standard Keyboard & Mouse, &#8212; 275W UL Power Supply included, &#8212; Micro-ATX Slim case.