Crucial 8GB Kit (4GBx2) DDR3 1066 MT/s (PC3-8500) CL7 SODIMM 204-Pin Notebook Memory Modules CT2CP51264BC1067 Module Size - 8GB kit (4GBx2) Package - 204-pin SODIMM Feature - DDR3 PC3-8500, PC/MAC compatible Specs - DDR3 PC3-8500; CL=7; Unbuffered; NON-ECC; DDR3-1066; 15V; 512Meg x 64