OCZ OCZ2RPR8004GK 4 GB (2 x 2 GB) Reaper Series DDR2 800MHz Memory Kit 800MHz DDR2/Unbuffered 5-5-5-18 (CAS-TRCD-TRP-TRAS)/Patent-pending Reaper HPC Heatsink* 1.85V EVP** 1.8 Volts /240 Pin DIMM OCZ Lifetime Warranty Available in 4GB (2x2048MB)Dual Channel Kits