Full Details on Amazon.com : http://www.amazon.com/gp/product/B004LTCI60?tag=tsukuyomi-20

Komputerbay 4GB 2X 2GB DDR2 1066MHz PC2-8500 DDR2 1066 (240 PIN) DIMM Desktop Memory with Heatspreaders

4GB 2X2GB DDR2 1066MHz PC2-8500 DDR2 1066 240 PIN DIMM Desktop Memory
100 Compatible with Desktops
BRAND NEW 2GB PC2-8500 DDR2 1066 Mhz Supports Dual Channel
Compatible with DESKTOPS THAT SUPPORT DDR2 240PIN MEMORY
Lifetime Warranty