OCZ OCZ2G10664GK 4GB 1066MHz PC2-8500 Gold Edition Dual Channel DDR2 Kit Gold XTC* Heatspreader /2.15V EVP** 1066MHz DDR2/Unbuffered CL 5-6-6-18/(CAS-TRCD-TRP-TRAS) 2.1 Volts/240 Pin DIMM Available in 4GB Dual Channel Kits