Lot of 2. The Samsung 256MB 400MHZ DDR2 desktop RAM memory is a single module with a capacity of 256MB. It is designed in a DIMM form factor and operates at a bus speed of PC-3200 (DDR-400). This RAM memory is ideal for upgrading or replacing existing memory modules in a computer system to enhance its performance and speed. The Samsung brand ensures reliability and quality in memory technology, making it a great choice for improving the overall efficiency of a computer system.