Komputerbay 16GB (4x 4GB) DDR3 SODIMM (204 pin) made with Major semiconductors 1333Mhz PC3 10600 (9-9-9-25) for Apple 16 GB with Heatspreader for extra Cooling Komputerbay 16GB (4x 4GB) DDR3 SODIMM (204 pin) made with Major semiconductors 1333Mhz PC3 10600 (9-9-9-25) for Apple 16 GB with Heatspreader for extra Cooling Well Tested. Non-ECC Non parity Voltage 1.5V. GOLD LEADS. SUPPORTS DUAL CHANNEL Lifetime Warranty COMPATIBLE WITH LAPTOPS