Thi DDR2 memory module has a total capacity of 1GB, split across two modules of 512MB each. It operates at a bus speed of PC2-6400 (DDR2-800) and is designed to work with a variety of computer components and parts. The module is compatible with 1Rx8 PC2-5300 -55-12D0 DDR2-667MHz-CL5 memory configurations, making it a versatile choice for computer enthusiasts and professionals alike.