EDGE Tech 512MB DDR2 SDRAM Memory Module - 512MB - 667MHz DDR2-667/PC2-5300 - Non-ECC - DDR2 SDRAM - 200-pin SoDIMM

667 MHz of memory speed with Unbuffered signal makes your computer great at multitasking SoDIMM 512 MB of memory is great for executing frequently used applications 200-pin-pin DDR2 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate