Best Buy: CMS 1GB (2x512MB) RAM Memory Compatible with Dell OptiPlex GX260 Destktops CM64643200DIMMX2005
PC Dell Optiplex GX260, 2 Gb Ram, 120Gb Hard Drive, 2.4 ghz Intel Pentium 4 cpu, DVD Burner, Floppy Drive, Keyboard, Mouse, 15" LCD Monitor, Windows XP SP3 32-Bit, Turns On, As