73P2868 I GENUINE IBM 512MB DDR SDRAM Memory 2x256 MB PC2100 ECC DIMM 73P2872Technical Information Memory Size 512 MB Memory Technology DDR SDRAM Number of Modules 2 x 256 MB Memory Standard PC2100 Error Checking ECC CAS Latency CL2. 5 Physical Characteristics Form Factor DIMM Listing is for one kit (2x256 MB). We ship all products according to manufacturer specifications. If the manufacturer does not include an option as standard with the product (power supply, fan tray etc) we do not either unless specifically stated. If you