1GB PC2-5300 ECC Registered DDR2-667
1024MB PC2-5300 DDR2-667 Registered ECC (2-Rank) (Non-Returnable/Non-Exchangable)
8GB DDR3-1600 ECC UnBuffered 1.5V UDIMM Module
8GB Module - DDR3 - ECC - Unbuffered - 1600MT/s - PC3-12800 - 11ns CAS Latency - 1.5V - Thermal Sensor - Lifetime Depot Carry-In Mfg. Warranty