Dell SFF/C2D3.0/4GB/500GB/XP: Dell Optiplex SFF Desktop - Intel Core 2 Duo 3.0GHz - 4GB DDR2 RAM - 500GB HDD - Microsoft Windows XP Professional - New WiFi - DVD/CD-RW. Specification: Pentium Dual Core 3.0Ghz CPU, New 4GB of RAM, 500GB Hard Drive, DVD/CDRW. Includes: New USB Wireless WiFi adapter, Keyboard, Mouse, and Power Cord. Runs it: Windows XP Professional 32bit! This certified reconditioned product is tested and certified by the manufacturer or by a third-party seller to look and work like new, with some signs of wear. The reconditioning process includes functionality testing, inspection and repackaging!