Enhance your computer's performance with this set of Samsung 4GB (1GB X 4) DDR2 memory modules. Consisting of four 1GB DIMMs, these modules have a bus speed of PC2-6400 (DDR2-800) and a total capacity of 4GB. Each module has a capacity of 4GB and requires 200 pins. Upgrade your computer's memory with this reliable and high-quality set of memory modules.