The Samsung 512MB 2x256MB PC 3200 DDR 400 ML0301004162 Memory is a set of two DDR1 SDRAM modules with a total capacity of 512 MB. Each module has a capacity of 256 MB and is manufactured by Samsung, a trusted brand in the industry. The memory features unregistered, non-ECC, and unbuffered operation, making it suitable for desktop computers. With a bus speed of PC-3200 (DDR-400), this memory module set is designed for standard profile usage and is a reliable choice for increasing the performance of your computer.