Acer Veriton X2631 - Intel Celeron Processor G1820 (2MB Intel Smart Cache 2.70GHz) Memory: 4GB (4/0) DDR3 SDRAM Storage: 500GB SATA hard drive 7200RPM; Super-Multi drive Graphics: Integrated Intel HD Graphics (350MHz base frequency 1.05GHz max dynamic frequency) Communications: Gigabit LAN OS: Windows 8.1 Pro (64-bit) / Windows 7 Professional (SP1 64-bit)