2    AData 2GB DDR3 1066 Memory modules come in a set of two DIMM form factor modules with a total capacity of 2GB each. These DDR3 SDRAM modules have a bus speed of PC3-8500 (DDR3-1066) and 240 pins for compatibility with a variety of computer systems. The ADATA brand is known for quality and reliability in memory products, making these modules a solid choice for upgrading or replacing existing memory modules in your computer system.