The G.Skill F2-6400CL5D 4GB PC2-6400 Desktop Ram Kit is a gently used memory kit designed for desktop computers. It includes two DDR2 SDRAM modules with a total capacity of 4GB, with each module providing 2GB of memory. The kit has a form factor of DIMM and a bus speed of PC2-6400 (DDR2-800). With 240 pins, this G. SKILL memory kit is a reliable option for upgrading your computer's memory capacity.