OCZ OCZ3M10664GK PC3-8500 DDR3 1066MHz SODIMM 4 GB Dual Channel Kit Available in 1GB and 2GB Modules/Available in 2GB and 4GB kits Lifetime Warranty CL 8-8-8-27 1066MHz DDR3 Unbuffered/1.5 Volts/ 204 Pin DIMM 1066MHz DDR3 CL 8-8-8-27 Unbuffered/1.5 Volts/ 204 Pin DIMM Lifetime Warranty Available in 1GB and 2GB Modules/Available in 2GB and 4GB kits