The Micron 256GB DDR4-2133 ECC Server RAM MTA36ASF2G72PZ-2G1 is a high-quality memory module designed for server use. With a capacity of 256GB, it provides ample storage for demanding applications and workloads. The DDR4-2133 ECC technology ensures reliability and error correction, making it a dependable choice for enterprise networking and server systems.Apart from the ai description, this was taken out of a fully operational HP server that I did not need anymore. There are 16 sticks of 16gb of capacity each stick for a total of 256GB. Feel free to ask any questions.