Komputerbay 4GB 2x 2GB DDR2 PC2 5300 667Mhz 240 Pin DIMM 4 GB KIT Komputerbay 4GB 2x 2GB DDR2 PC2 5300 667Mhz 240 Pin DIMM 4 GB KIT Well Tested. Non-ECC Non parity SUPPORTS DUAL CHANNEL Lifetime Warranty Memory Speed: 667 MHz