KOMPUTERBAY 16GB (4x 4GB) DDR3 1066 MHz PC3 8500 SODIMM CL7 204pin 1.5v Capacity: 16GB (4x4GB) For Apple iMac Well Tested. Non-ECC. Non parity Lifetime Warranty Timing is 7-7-7-20 with a Voltage at 1.5V. GOLD LEADS. SUPPORTS DUAL CHANNEL