EDGE Tech 512MB DDR2 SDRAM Memory Module - 512MB (1 x 512MB) - 667MHz DDR2-667/PC2-5300 - Non-ECC - DDR2 SDRAM - 240-pin

667 MHz of memory speed with Unbuffered signal makes your computer great at multitasking 512 MB of memory is great for executing frequently used applications DDR2-667/PC2-5300 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