Windows 10 Pro CPU .. Intel I5 2500 Quad Core 3.30 GHz MB. Gigabyte GA-Z77P-D3 SSD MSata 240 GB (NEW) HD. 1 TB Seagate DDR3 16 GB 1600 MHz MSI Radeon RX 580 4 GB PSU 750 W EVGA (NEW) 4 USB 3 , 2 FRONT , 2 BACK