The Patriot Signature PC2-5300 DDR2 memory is designed with superior performance and stability in mind at an affordable price. Operating at 667MHz, it is suitable upgrade for all users and system integrators seeking the perfect upgrade for their system. Ideal for both home-built as well as brand specific systems Patriot Signature memory is the perfect mix of Quality and Value in memory modules today. Rigorous testing standards and top of the line components ensure every module is 100% compatible. Affordability has never before been found in a premium memory line. The memory modules are also backed by Patriot's life time warranty making the Signature Line the memory of choice.