AA32C12864-PC400 - AddOn JEDEC Standard 1GB DDR 400MHz Unbuffered Dual Rank 2.5V 184 pin CL3 UDIMM For Motherboard 1 GB (1 x 1GB) DDR 400/PC 3200 DDR SDRAM 400 MHz Dual rank Memory CL3 2.50 V Non ECC Unbuffered 184 pin DIMM Lifetime Warranty