KOMPUTERBAY 4GB (4X 1GB) DDR2 800MHz PC2-6300 PC2-6400 (240 PIN) DIMM Desktop Memory with Samsung Semiconductors KOMPUTERBAY 4GB (4X1GB) DDR2 800MHz PC2-6300 PC2-6400 (240 PIN) DIMM Desktop Memory with Samsung Semiconductors 100% Compatible with Desktops. BRAND NEW 4GB PC2-6300 PC2-6400 DDR2 800 Mhz. Supports Dual Channel. Compatible with desktops that support DDR2 240PIN memory Lifetime Warranty