16GB, 4x4GB DDR3-1333MHz PC3-10600 NEMIX RAM SODIMM Memory Upgrade for Apple iMac Mid 2011 12, 1 12, 2 with Intel Core i5 Quad-Core 3.1GH z MC814LL/A, MC813LL/A, i5 Quad-Core 2.7GH z MC813LL/A, i7 Quad-Core 2.8GH z MC812LL/A, i7 Quad-Core 2.7GH z MC812LL/A, i5 Quad-Core 2.5GH z MC309LL/A A (iMac 12, 2). Apple recommends installing memory in matching pairs for best performance. JEDEX Standard and Apple Specifications exceeded. NEMIX RAM is backed by Lifetime Warranty. Volume discounts for Schools, Colleges and Universities available - please contact us through Newegg.
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