Dell 170L Tower Computer 512MB 40GB CD Windows XP Memory: 2 DIMM slots; Non-ECC dual channel shared1 DDR400 or DDR3332 SDRAM system memory up to 2GB using 128MB, 256MB, 512MB and 1GB modules I/O Ports - USB 2.0 (2-front, 4-back), Serial, Parallel, PS/2 keyboard, PS/2 mouse, RJ-45, VGA out (or external video), stereo line-in (minijack), microphone-in (minijack), speakers/line-out (minijack) and headphone (minijack - front) ATX micro-tower; vertical orientation (HxWxD), 36.8 x 18.4 x 42.6 cm (14.5 x 7.25 x 16.75 inches); weight (includes 1-HDD, CD-ROM, FDD) ~10.4kg; (~23lbs); one external 3.5" drive bay, two external 5.25" peripheral bays, two internal 3.5" drive bays, 3 PCI slots (4.2"H x 6.95"L) Enhanced IDE ATA 6.0 40GB Hard Drive