The Elpida PC2-6400S-666 2GB Kit (2x1GB) DDR2 200-Pin SO-DIMM Non-ECC memory module is a reliable and efficient RAM upgrade for computers. With a total capacity of 2GB split into two 1GB modules, this DDR2 SDRAM offers fast performance and stability. The compact SO-DIMM form factor and 200-pin design make it easy to install into a variety of laptop or desktop systems. The Elpida brand ensures quality and compatibility, making this memory module a dependable choice for improving your computer's speed and multitasking capabilities.