The Patriot 4GB Kit (2 X 2GB) PC2-6400 DDR2-800MHz is a high-quality memory upgrade designed for computers. This dual-channel memory kit includes two 2GB modules, providing a total capacity of 4GB. With DDR2 SDRAM technology and a bus speed of PC2-6400 (DDR2-800), it delivers fast and reliable performance. Backed by a lifetime manufacturer warranty, this memory kit is a dependable choice for upgrading your computer's memory capacity.