16GB (4 X 4GB) DDR3 1600MHz PC3-12800 240-pin Memory RAM DIMM Kit for Desktop PC by NEMIX RAM at Amazon.com
8GB (2 X 4GB) DDR3 1600MHz PC3-12800 240-pin Memory RAM DIMM Kit for Desktop PC by NEMIX RAM at Amazon.com
OWC 8 GB (2 X 4GB) ram PC8500 DDR3 1066MHz sodimm 204-pin Memory Upgrade Kit, (OWC8566DDR3S8GP), Compatible with MacBook Pro, MacBook, Mac Mini and iMac at Amazon.com
4GB DDR3 1600MHz Non-ECC PC RAM Module | Integral Memory
Silicon Power DDR3 (4GB) for PC3-12800s | PC3-12800 DDR3
DDR3 Desktop RAM, 4GB 1333Mhz High Frequency DDR3 240PIN PC3-10600 Computer Memory RAM 1.5V for Intel/ AMD at Amazon.com