This Dell Optiplex GX520 Desktop PC (Off-Lease) offers powerful computing in a convenient, space-saving design. This small form factor sized desktop comes loaded with a 2.8GHz Intel Pentium 4 521 2.8GHz processor, 1GB of RAM, 40GB hard drive, and Windows XP Pro operating system. The Dell Optiplex GX520 Desktop PC also features a DVD-ROM/CD-RW combo optical drive.