Transcend 2GB DDR2 SDRAM Memory Module - 2GB - 667MHz DDR2-667/PC2-5300 - ECC - DDR2 SDRAM - 240-pin DIMM

667 MHz of memory speed makes your computer great at multitasking DIMM 2 GB of memory to refine your computers performance DDR2 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate