4GB DDR3, 240-pin DIMM, 1600MHz, Registered (buffered)
Micron MT18JSF51272PZ-1G6K1, 4 GB, DDR3, 1600 MHz, 240-pin DIMM
Micron MT18JSF51272PZ-1G6K1. Internal memory: 4 GB, Internal memory type: DDR3, Memory clock speed: 1600 MHz, Memory form factor: 240-pin DIMM