1GB DDR2-667 Non-ECC SO-DIMM
1GB Module - DDR2 SO-DIMM - Non-ECC - Unbuffered - 667MT/s - PC2-5300 - 5ns CAS Latency - 1.8V
4GB DDR3L-1600 SODIMM ( 8-chips)
4GB Module - DDR3 SO-DIMM - Non-ECC - Unbuffered - 1600MT/s - PC3L-12800 - 11ns CAS Latency - 1.35V - Lifetime Depot Carry-In Mfg. Warranty