EDGE PC2-6400 (800MHz) Registered DDR2 SDRAM - For Desktop PC - 4 GB (1 x 4GB) - DDR2-800/PC2-6400 DDR2 SDRAM - 800 MHz - ECC - Registered - 240-pin - DIMM - Lifetime Warranty

800 MHz of memory speed makes your computer perform like an athlete 4 GB of memory to refine your computers performance DDR2-800/PC2-6400 operates at up to 400 MHz data bus speed with minimal power consumption and as a result, you get optimal computer performance with an improved memory heat dissipation