Patriot Memory's Signature Line DDR4 SODIMM memory delivers the quality, reliability and performance expected for today's notebook needs. This 8GB module is designed to run at 2666MHz (PC4-21300) at CAS 19 latency timings. Built using specific build-of-materials (BOMs) we ensure that every module meets and exceeds industry standards: offering you a hassle-free upgrade. We certify every component that goes into our modules, including the modules themselves, which must pass strict standards to ensure compatibility, quality and reliability.