The Micron 16GB 2Rx8 DDR4-2666 PC4 ECC Server Memory is a high-quality, reliable server RAM module designed for enterprise networking and server systems. With a total capacity of 16GB spread across a single module, this DDR4 SDRAM RDIMM module offers fast bus speed at PC4-21300 (DDR4-2666) and memory features like ECC error correction. The unit is ideal for servers requiring accurate data processing and smooth operation, making it a dependable choice for businesses looking to enhance their computing infrastructure. Taken from working Dell Poweredge R640 server