This IBM EM8D DDR3 SDRAM main storage module has a total capacity of 64GB, with a single module of 64GB. It is designed to fit a DIMM form factor and is a great addition to any server's memory capacity. This module is ideal for handling enterprise networking and server components, making it a reliable choice for any business or organization. With its high-quality construction and advanced technology, this IBM DDR3 SDRAM module is sure to provide optimal performance and long-lasting durability.