4GB DDR3-1066 ECC Un-Buffered
Samsung 4GB DDR3-1066 ECC Un-Buffered M391B5273BH1-CF800 1Gx72bit chips 240pin 1066/533mhz
1GB DDR3-1333 ECC UDIMM
1GB Module - DDR3 - ECC - Unbuffered - 1333MT/s - PC3-10600 - 9ns CAS Latency - 1.5V - Samsung F-Die DRAM Modules