This Dell Optiplex GX620 desktop computer runs on an Intel Pentium 4 processor with a speed of 2.40 GHz and has a 2 GB RAM along with a 40 GB hard drive capacity with CDRW. It comes with Windows XP operating system and has a Small Form Factor (SFF) design. The Dell Optiplex GX620 desktop computer is a reliable and efficient machine for all your computing needs.