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 Memory for HP Pavilion Entertainment dv6 1300 Series DDR3 PC3-8500 1066MHz 204 pin SODIMM Notebook Laptop RAM (Parts-Quick Brand) at Amazon.com