HP ProDesk 400 G3 Microtower Intel Core i5-6500 with Intel HD Graphics 530 (3.0 GHz, 6 MB cache, 4 cores), Intel H110 Express Chipset, 4 GB 1600 MHz DDR3 SDRAM (1 x 4 GB), 500 GB 7200 rpm SATA, SATA SuperMulti DVD writer, Realtek Gigabit NIC, 3 full-height PCIe (x1); 1 full-height PCIe x16; 1 media card reader, 2 USB 3.0; 6 USB 2.0; 2 internal USB 2.0 hearders for media card reader, 2 PS/2; 1 VGA; 1 DVI-D, Realtek ALC 221 Audio, Stereo audio line out and integrated speaker, 300W PS, HP USB Keyboard and Mouse, Windows 7 Professional 64 (available through downgrade rights from Windows 10 Pro), 1-Year HP Warranty + HZ550E Carepack 3 Years Warranty PC Only