The A-Tech DDR3-1333-4G Long DIMM RAM Memory Module is a high-quality memory module with a total capacity of 4GB. It is designed for computers and networking devices that require reliable memory performance. With a bus speed of PC3-10600 (DDR3-1333) and ECC memory features, this module provides stable and efficient memory access for your system. Additionally, the lifetime manufacturer warranty ensures long-lasting support and peace of mind for your computing needs.