The product is three 512MB DDR RAM module with a bus speed of PC-2100 (DDR-266) and error correction code (ECC) functionality. It is designed for use in computers and networking systems requiring reliable memory performance. The modules are produced by GATEWAY and INFINEON, with a form factor of DIMM, making it compatible with a wide range of systems. The total capacity of the memory module is 512MB, with each module providing 512MB of memory for a total of 1GB in a dual-channel configuration. Ideal for improving system performance and ensuring data integrity, this DDR RAM module is a reliable choice for various computer components and parts. Two made on USA and one made Italy