This Nanya DDR2 SDRAM memory kit includes four 1GB UDIMM modules, each with a capacity of 1GB, and a bus speed of PC2-6400 (DDR2-800). The memory kit is compatible with a wide range of older computers, tablets, and networking devices, making it perfect for upgrading your system's memory. The Nanya memory kit features a total of 240 pins, and its form factor makes it easy to install.