Upgrade your server's memory capacity with this lot of 5 Intel Optane DDR4 SDRAM modules. These 128GB RAM modules have a total capacity of 640GB, and a bus speed of PC4-21300 (DDR4-2666). Designed to work seamlessly with Intel-based servers, these RDIMM modules are a perfect fit for your enterprise networking and server needs. With the brand name Intel, you can be assured of the quality and reliability of these modules.