Dell XPS 8900 Special Flagship Edition windows 7 Pro Desktop with Keyboardand Mouse (Intel Quad-Core i7-6700 8M Cache 3.4GHz 16G 2TB HDD HDMI 4G NVIDIA Graphics) Windows 7 Professional 64 Bit pre-loaded (Free upgrade to Windows 10 Pro 64-Bit) 6th Generation Intel Quad-Core i7-6700 Processor (8M Cache, up to 4.0 GHz) 16GB, 2133MHz, DDR4 up to 64GB 2TB 7200 rpm Hard Drive NVIDIA GeForce GTX 745 4GB DDR3 Graphics card , DVD-RW Drive (Reads and Writes to DVD/CD) Dell Wired keyboard and laser mouse included