8GB KIT (2 x 4GB) SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz For IBM-Lenovo Thinkpad Notebook Series. Designed For IBM-Lenovo Thinkpad Notebook Series: E130, E320, E325, E330, E420, E420s, E425, E430, E430c, E431, E520, E525, E530, E530c, E531, E535, E545, S430, L420, L430, L520, L530, S531, T410si, T420, T420i, T420s, T430, T430i, T430s, T430u, T520, T520i, T530, T530i, W520 (4 Slots), W520 (Dual Core), W530 (Dual Core), W530 (Quad Core), X131e (Intel), X220, X220i, X230, X230 Tablet, X230i. Will also work with many other brands and models. Genuine A-Tech Brand: 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 system 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 and includes toll free technical support at 1-866-557-4527. Give your computer the best, trust A-Tech!