Komputerbay 4GB DDR2 DIMM (240 PIN) 667Mhz PC2 5400 PC2 5300 4 GB 4GB DDR2 DIMM 667MHZ PC2 5400 PC2 5300 240PIN Well Tested. Non-ECC Non parity Voltage 1.8V. SUPPORTS DUAL CHANNEL TRIPLE CHANNEL AND QUAD CHANNEL Lifetime Warranty GOLD LEADS