16GB 4x 4GB DDR3 PC3-10600 1333 Memory For Apple iMac 21.5 and 27-inch, Mid 2011 | eBay
16GB [4x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Apple iMac 12,2 (27-inch, 2.7GHz, MC813LL/A) Quad-Core Intel Core i5 (Genuine A-Tech Brand) at Amazon.com
Amazon.com: 32GB (4 x 8GB) PC10600 DDR3 1333MHz SO-DIMMs Memory Compatible with Mid 2010/2011 21.5" & 27" iMac Models, 2011 Mac Mini : Everything Else
2GB Mac Memory Upgrade DDR3-1333 PC3-10600 SODIMM - 661-5475 661-5528
imac memory "ddr3 1333mhz" | Newegg.com
Apple Memory Module 8GB 1333MHz DDR3 (PC3-10600) - 2x4GB at Amazon.com
16GB 1333 MHz DDR3 Memory for 2011 MacBook Pro and iMac
imac memory "ddr3 1333mhz" | Newegg.com
Install memory in an iMac – Apple Support (AU)
Apple iMac 2011 Memory 4GB DDR3 1333MHz PC3-10600 204-Pin
16GB Memory Upgrade Kit For Apple iMac 2010-2011
Timetec Hynix IC 8GB Compatible for Apple DDR3 1333MHz PC3-10600 SODIMM Memory for Early/Late 2011 13/15/17 inch MacBook Pro, Mid 2010 and Mid/Late 2011 21.5/27 inch iMac, Mid 2011 Mac Mini (8GB) - Walmart.com
16GB 1333 MHz DDR3 Memory for 2011 MacBook Pro and iMac