The 8GB Micron DDR4 2133MHz PC4-2133 Desktop RAM DIMM MTA8ASF1G72PZ is a high-quality memory module designed for desktop computers. With a total capacity of 8GB and a bus speed of PC4-21300 (DDR4-2666), it offers fast and reliable performance. The module is manufactured by Micron, a trusted brand in memory technology, and comes with a lifetime warranty for added peace of mind. It is a single module with ECC memory features, making it suitable for demanding computing tasks. Made in China, this RAM unit is a solid choice for upgrading your computer's memory capacity. UNTESTED, MAY NOT WORK. NO REFUNDS.