G.Skill Extreme Series DDR II PC6400 Dual Channel - Desktop Memory - 2 GB ( 2 x 1 GB ) - DIMM 240-pin - DDR2 - 800 MHz / PC2-6400 - CL4 - 2.0 - 2.1 V - unbuffered - non-ECC 2Gb 800MHz Micron D9 chips PC2-6400 (DDR2-800) Dual channel kit