Komputerbay 2GB 2X 1GB DDR2 533MHz PC2-4200 PC2-4300 DDR2 533 (240 PIN) DIMM Desktop Memory CL 4 Komputerbay 2GB 2x 1GB DDR2 PC2 4200 533Mhz 240 Pin DIMM 2 GB KIT Well Tested. Non-ECC Non parity Unbuffered SUPPORTS DUAL CHANNEL RAM Memory Technology: DDR2 SDRAM Memory Speed: 533 MHz