8GB (2 X 4GB) DDR3 1600MHz PC3-12800 240-pin Memory RAM DIMM Kit for Desktop PC by NEMIX RAM at Amazon.com
Hynix HMT451U6BFR8C-PB 8GB 2 x 4GB PC3-12800U DDR3 1600 CL11 Desktop Memory Kit 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
TIMETEC Hynix IC 8GB Kit (2x4GB) DDR3-1600 SODIMM - Timetecinc.com - Memory of Lifetime and Easy Upgrades
Corsair XMS3 4GB (2 x 2GB) Dual Channel DDR3 CMX4GX3M2A1600C9
8GB (2 X 4GB) DDR3 1066MHz PC3-8500 240-pin Memory RAM DIMM for Desktop PC by NEMIX RAM at Amazon.com
Crucial 8GB (2 x 4GB) DDR3L 1600 (PC3L 12800) Desktop Memory Model CT2K51264BD160B Desktop Memory - Newegg.com