Lenovo ThinkCentre M90p 5498E8U Desktop (Intel Core i5-660 Processor, 3GB RAM, 500GB 7200RPM S-ATA HDD, Windows 7 Professional 32 Bit) Intel HD Graphics Intel Core i5 3.3GHz Processor 3GB RAM, 500GB Hard Drive DVDRW/8 USB Ports (6 rear, 2 front) Windows 7 Pro 64 Bit, Keyboard and Mouse