AXIOM 512MB DDR SDRAM Memory Module - 512MB - 266MHz DDR266/PC2100 - ECC - DDR SDRAM - 184-pin DIMM, axiom 512mb ddr sdram memory module - 512mb (2 x 256mb) - 266mhz ddr266/pc2100 - ecc - ddr sdram - 184-pin 43201402 62280c axm mm h xc021427e RAM Module 5