The Kingston HyperX Blu 9905403-558.A00LF Memory RAM is a DDR3 SDRAM memory module that has been tested and confirmed to be in working condition. It is manufactured by Crucial, a reputable brand known for producing high-quality memory modules. This RAM is designed for optimal performance and reliability, making it an excellent choice for upgrading your computer's memory capacity. Its origin in the United States ensures quality and compatibility with a wide range of systems.