Dell Optiplex 7020 Business-Class Desktop Small Form Factor SFF Intel Quad Core i7 i7-4790 8GB DDR3 500GB 7200RPM HDD DVDRW Windows 8.1 Processor: Intel Core 4th Gen i7-4790 (Quad Core HT, 3.60GHz Turbo, 8MB, w/ HD Graphics 4600) 8 GB Dual Channel DDR3 at 1600MHz Non-ECC; 500 GB SATA Hard Drive (7200 RPM) Intel Integrated Graphics; 8XSlimLine DVD +/- RW Drive; Keyboard & Mouse Included Windows 8.1 (64Bit) (Free Upgrade to Windows 10) Dell 3 Year Hardware Service with Onsite/In-Home Service After Remote Diagnosis**