8GB 2 X 4GB DDR3 PC3-8500 1066MHz SODIMM Memory RAM for Apple iMac Intel Core 2 Duo 20" inch 24" inch (Early 2009) Equivalent to MC016G/A (PARTS-QUICK BRAND) Halogen Free; ROHS Speed: PC3 8500 1066MHz Form Factor: 204 pin SODIMM Capacity: 8GB 2X4GB KIT Warranty Lifetime