Product Detail 800MHz DDR2/ Unbuffered 4-4-4-15/(CAS-TRCD-TRP-TRAS) Titanium XTC* Heatspreader / 2.2 Volts /240 Pin DIMM 2.25V EVP** /EPP-Ready Available in 2GB(2048MB) /Modules and 4GB(2x2048MB) Dual Channel Kits . The "OCZ OCZ2T800C44GK 4 GB 2 x 2 GB DDR2 800MHz Titanium Series Memory Kit" is best product for you. We recommended OCZ OCZ2T800C44GK 4 GB 2 x 2 GB DDR2 800MHz Titanium Series Memory Kit