4GB DDR3, 240-pin DIMM, 1333MHz, Registered (buffered)
Micron MT36JBZS51272PY-1G4D1, 4 GB, DDR3, 1333 MHz, 240-pin DIMM
Micron MT36JBZS51272PY-1G4D1. Internal memory: 4 GB, Internal memory type: DDR3, Memory clock speed: 1333 MHz, Memory form factor: 240-pin DIMM