This Dane-Elec NANYA DDR1 SDRAM memory module has a total capacity of 256 MB, a single 256 MB module. It has a bus speed of PC-3200 (DDR-400) and a number of pins of 184. The model number is NT256D64S88B1G-5T and features non-ECC unbuffered memory. The memory module is compatible with various computer components and parts and is a great addition to boost your computer's performance. This unit is sold as a single module and is perfect for those who need to upgrade their computer's memory.