Dell OptiPlex GX620 Pentium 4 521 2.8GHz 1GB 80GB DVD&plusmn;RW XP Professional Desktop Dell OptiPlex GX620 Pentium 4 2.8 GHz Desktop PC General Features: Desktop form factor Microsoft Windows XP Professional pre-installed w/CoA and reinstallation partition Intel Pentium 4 521 2.8 GHz processor Intel 945G Express chipset 1 GB DDR2 RAM (4 GB maximum) 80 GB SATA hard drive DVD RW drive No Floppy drive Intel Graphics Media Accelerator 950 Integrated AC'97 audio