Product Detail 512 MB Lifetime Warranty . The "EDGE - Memory - 512 MB - DIMM 184-pin - DDR - 266 MHz / PC2100 - unbuffered - non-ECC" is best product for you. We recommended EDGE - Memory - 512 MB - DIMM 184-pin - DDR - 266 MHz / PC2100 - unbuffered - non-ECC