512MB, 1GB, 2GB: (x64, DR) 240-Pin DDR2 SDRAM UDIM.
Micron
MT16HTF25664A - 2GB DDR2 SDRAM Unbuffered DIMM
512MB, 1GB, 2GB: (x64, DR) 240-Pin DDR2 SDRAM UDIMM Features DDR2 SDRAM Unbuffered DIMM MT16HTF6464A – 512MB MT16HTF12864A – 1GB MT16HTF25664A – 2GB .