4GB (2Rx8, 1.5V) PC3-12800 DDR3-1600 LP UDIMM
IBM 4GB (2Rx8, 1.5V) PC3-12800 DDR3-1600 LP UDIMM, 4 GB, DDR3, 1600 MHz, 240-pin DIMM
IBM 4GB (2Rx8, 1.5V) PC3-12800 DDR3-1600 LP UDIMM. Internal memory: 4 GB, Internal memory type: DDR3, Memory clock speed: 1600 MHz, Memory form factor: 240-pin DIMM, CAS latency: 11, ECC