512MB DDR2-800 Non-ECC UDIMM
512MB Module - DDR2 - Non-ECC - Unbuffered - 800MT/s - PC2-6400 - 6ns CAS Latency - 1.8V
8GB DDR2-667 ECC FB-DIMM Dual-RANK 240pin
Hynix 8GB DDR2-667 PC2-5300F ECC FB-DIMM ( full-Buffered) HMP31GF7AFR4C-Y5D5 - 8GB 8GB) - DDR2 - ECC - Fully Buffered - 667MT/s