The Patriot Memory Signature Line 4GB DDR3 PC3-10600 DIMM kit includes two 2GB modules of DDR3 SDRAM memory. These memory modules have a bus speed of PC3-10600 (DDR3-1333MHz) and a total capacity of 4GB. The DIMM form factor makes them compatible with a wide range of memory slots, and the Patriot Memory brand ensures quality and reliability in your computer's memory performance. Upgrade your system's memory with this high-performance kit from Patriot Memory.