Ramjet 16GB (2x8GB) DDR3 1333 Upgrade Memory Module for iMac 11.3 (i5 & i7) 12.1 12.2 16GB DDR3-1333 MHz SO-DIMM (2x8GB) for iMac 11,3 (i5 and i7) 12,1 and 12,2 This product is not compatible with the iMac 11,3 with i3 processor Optimized and rigorously tested for Macs All Ramjet products are sold exclusively by the Ramjet Store