The Crucial difference As a brand of Micron one of the largest memory manufacturers in the world we manufacture our memory in-house to meet three key criteria Quality All Crucial DRAM is classified as premium-quality and is extensively tested for performance and OEM compatibility before during and after the production process. Compatibility With memory designed for over 50000 systems and with products that range from energy-efficient DDR3L modules to legacy DDR offerings we have one of the most complete portfolios in the industry. Selection Backed by one of the industry's most in-depth quality test programs thirty years of manufacturing expertise and a limited lifetime warranty our modules are built to last..