The A-Tech ATMS394705A25978X1 memory RAM module was specifically engineered to be compatible with the ASUS ROG Strix GL503. Included in the package is a Genuine A-Tech Brand 8GB Single DDR4 PC4-2666 / PC4-21300 1RX8 1.2V LAPTOP & NOTEBOOK Non-ECC Memory Module (260-Pin SODIMM 2666MHz) upgrade. A-Tech is one of the most trusted names in Premium Memory. Backed by a Lifetime Warranty and 5 star customer support, A-Tech has you covered! Memory upgrades have never been easier. Designed specifically to help your computer run faster and smoother, an A-Tech memory upgrade is one of the fastest, most affordable, and easiest ways to improve your system's performance. A-Tech memory empowers your computer to achieve faster application loading times, faster system responsiveness, and increased ability to multitask and handle data-intensive programs. A-Tech modules are rigorously tested to ensure that your memory meets our stringent compatibility and performance standards. Every A-Tech ram module is tested for complete functionality before it leaves our doors. Give your computer the best, trust A-Tech!