OCZ OCZ2P10664GK DDR2 PC2-8500 1066 MHz Platinum Series 4 GB Dual Channel Memory Kit Platinum-Mirrored XTC Heatspreader EPP 5-5-5-18/(CAS-TRCD-TRP-TRAS) 1066MHz DDR2/Unbuffered 2.1 - 2.2V/240 Pin DIMM Available in 2 GB Modules and 4 GB (2x2048MB) Dual Channel