Visiontek 8GB 240-Pin PC RAM DDR3 1600 (PC3 12800) Black Label Memory Model 900667 - Walmart.com
PC4-19200 4 GB RAM Chip
PC3-8500 8 GB RAM Chip
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