Samsung MV-2V1G4 1GB DDR2 SDRAM Desktop Memory Module (800MHz PC2-6400) Add 1 GB of memory to your DDR2-compatible PC or computer server Compatible with PC2-6400, PC2-5300, PC2-4200 and PC2-3200 memory solutions Advanced 40-nm technology uses up to 47 percent less power than conventional 60-nm modules Two-thirds as wide as conventional memory modules Backed by a limited lifetime warranty