512MB DDR2-800 Non-ECC UDIMM
512MB Module - DDR2 - Non-ECC - Unbuffered - 800MT/s - PC2-6400 - 6ns CAS Latency - 1.8V
1GB DDR2 PC2-3200R ECC REG 1Rx4
1GB DDR2 PC2-3200 ECC REGISTERED 1-rank - 1GB Module - DDR2 - ECC - Registered - PC2-3200
128MB PC800 RDRAM-1600
128MB 184pin 8Mx16 Non-ECC PC800-40ns RIMM-1600 (Samsung)