The IBM FRU 73P2872 is a DDR1 SDRAM memory module with a total capacity of 256 MB. It is designed for server use with features like ECC memory and registered design. The module operates at a bus speed of PC-2100 (DDR-266) and is a single unit with a weight of 1 lb. Ideal for enterprise networking and server applications, this IBM memory module is a reliable choice for enhancing server performance and capacity.