Gateway Celeron 2.6GHz 512MB 40GB CD FDD with Windows XP Gateway E2100 Celeron 2.6GHz Black Desktop System General Features: Microsoft Windows XP Home pre-installed w/COA Intel Celeron 2.6 GHz processor 512MB RAM 40 GB hard drive CD Drive 1.44 MB floppy drive Integrated audio Integrated video Expansion Slots: Two (2) 184-pin DIMM sockets One (1) Useable PCI slot (occupied) I/O Ports: Two (2) PS/2 ports