Dell Optiplex Gx520 - Super Fast Desktop Computer, 3.0 GHZ , Intel Pentium 4, 80 Gb Hard Drive, 1 Gb Ram, DVD Drive (Watch DVD Movies), Licensed Windows Xp Professional with Recovery Cd Intel 945G chipset with Intel Pentium 4 processor with 800 MHz front side bus and Hyper-Threading 2 DIMM slots Non-ECC dual channel shared2 DDR2 SDRAM system memory (400 and 533Mhz) up to 2GB Eight USB 2.0 (two front and six rear), one Ethernet (RJ45), one nine-pin serial (16550 compatible) Integrated Intel Graphics Media Accelerator 950