Product Detail 4GB DDR2 DIMM 800MHZ PC2 6400 PC2 6300 240PIN Well Tested. Non-ECC Non parity Voltage 1.8V. SUPPORTS DUAL CHANNEL TRIPLE CHANNEL AND QUAD CHANNEL Lifetime Warranty GOLD LEADS . The "4GB DDR2 DIMM 240 PIN 800Mhz PC2 6400 PC2 6300 4 GB - CL 5" is best product for you. We recommended 4GB DDR2 DIMM 240 PIN 800Mhz PC2 6400 PC2 6300 4 GB - CL 5