Dell Optiplex 7020 Mini Tower | Intel i7-4790 | 8 GB DDR3 | 500 GB 7200 RPM | Windows 8.1 Pro Processor: Intel Core 4th Generation i7-4790 processor (8M Cache, up to 4.0 GHz) 8 GB Dual Channel DDR3 at 1600MHz (2x 4GB) Non-ECC 500 GB 3.5 Inch SATA 6Gb/s with 16MB DataBurst Cache 16X DVD +/- RW Drive | Intel Integrated Graphics Windows 8.1 Pro