FS: Dell Dimension 8400 Pentium 4 3.0ghz. OS is XP Home. I have the OS disc and recovery discs. Comes with a 40 GB SATA hard drive and 2 GB of DDR2 RAM. Computer has and DVD burner and a DVD drive. I upgraded the video card to a Nvidia GeForce 8400 GS. Includes on USB optical Mouse and a standard keyboard. I am also including a 250 GB external HD.