512MB DDR2-667 Non-ECC DIMM
512MB Module - DDR2 - Non-ECC - Unbuffered - 667MT/s - PC2-5300 - 5ns CAS Latency - 1.8V
1GB PC3200 DDR400
1GB Module - DDR - Non-ECC - Unbuffered - 400MT/s - PC-3200 - 3ns CAS Latency - 2.6V - Lifetime Depot Carry-In Mfg. Warranty