The Crucial Ballistix Sport 8GB 2x4GB DDR3 1333MHz RAM modules are designed for high performance and reliability in gaming and other intensive applications. With a total capacity of 8GB split into two 4GB modules, these DIMM modules have a bus speed of PC3-10600 (DDR3-1333) for fast data transfer rates. The Crucial brand is known for its quality memory products, making these RAM modules a good choice for upgrading your computer's memory capacity.