Kingston Technology System Specific Memory Memory 256MB 533MHz DDR2 PC4200 DIMM, 0.25 GB, DDR2, 240-pin DIMM Kingston Technology System Specific Memory Memory 256MB 533MHz DDR2 PC4200 DIMM. Internal memory: 0.25 GB, Internal memory type: DDR2, Memory form factor: 240-pin DIMM, ECC