Dell Alienware X51 R3 SlimStyle Gaming Desktop - Intel Core i5-6400 Quad-Core (Up to 3.3GHz with Turbo Boost Technology), 16GB Memory, 2TB HDD, GeForce GTX 745 with 4GB DDR3, DVD Burner, Windows 10 Intel Core i5-6400 (6MB Cache, up to 3.3GHz with Turbo Boost Technology) Includes Hyper-Threading 16GB DDR4 SDRAM at 2133MHz, 2TB SATA Hard Drive 7200 RPM, NVIDIA GeForce GTX 745 with 4GB DDR3 Slot-Loading Dual Layer DVD Burner (9.5mm) , Intel Dual Band Wireless-AC 7265 2x2 + Bluetooth 4.0 Internal High-Definition 7.1 Performance Audio with Waves MaxxAudio, Alienware Multimedia Keyboard, AW Standard Optical Mouse Windows 10 64-bit Operating System, 1 Year Limited Warranty