The Crucial 8GB DDR4-2666 PC4-21300 Memory module (CT8G4DFRA266) is a high-quality RAM unit designed for computers and servers. With a total capacity of 8GB and a form factor of UDIMM, this memory module is perfect for upgrading your system's memory capacity. The DDR4 SDRAM technology ensures fast data transfer speeds, while the non-ECC and unbuffered features provide reliable performance. Made by Crucial, a trusted brand in the industry, this memory module is a dependable choice for improving your computer's performance.