The Kingston KTH-XW667/8G 397415-B21 RAM is a DDR2 SDRAM memory module with a total capacity of 8GB divided into 2 4GB modules. With a bus speed of PC2-5300 (DDR2-667), this RAM is designed for high performance in computers and servers that require reliable memory support. Kingston is a trusted brand known for producing quality memory products, making this RAM a reliable choice for enhancing your system's capabilities.