32GB 4x8GB DDR3L-1600MHz PC3-12800 SODIMM Memory RAM for Apple iMac Late 2012 27" 21.5, iMac 13,2 13,1 with Intel Core i7 Quad-Core 3.2GHz 3.4GHz 27" MD096LL/A CTO, i5 Quad-Core 2.9GHz 27" MD095LL/A, i7 Quad-Core 2.7GHz 2.9GHz 3.1GHz MD094LL/A CTO. Apple recommends installing memory in matching pairs for best performance. MemoryMasters is backed by Lifetime Warranty. Additional Details ------------------------------ Package quantity: 1