Total 1GB. Two 512MB PC3200 DDR SDRAM Non-ECC 184 pin 2.5V 400MHz Unbuffered DIMM Memory

Guaranteed and tested. 100% compatible with many systems including but not limited to :

Dell Dimension 1100, 2400, 3000, 4550, 4600, 4600C, 8300, B110, XPS, XPS Gen2 (800MHz and 533MHz bus models).

Dell Optiplex 170L, 170LN, GX270, SX270 (800Mhz and 533MHz bus models)

Precision Workstation 360 and 360N (800MHz and 533MHz bus models)