Komputerbay 4GB DDR3 SODIMM (204 pin) 1066Mhz PC3 8500 4 GB with SODIMM Heatsink for extra cooling (7-7-7-20) Komputerbay 4GB DDR3 SODIMM (204 pin) 1066Mhz PC3 8500 4 GB with SODIMM Heatsink for extra cooling (7-7-7-20) Well Tested. Non-ECC Non parity Voltage 1.5V. GOLD LEADS. SUPPORTS DUAL CHANNEL Lifetime Warranty and comes with SODIMM Heatsink for extra cooling COMPATIBLE WITH LAPTOPS