2GB STICK SO-DIMM DDR3 NON-ECC PC3-8500 1066MHz For HP-Compaq Presario Notebook Series. Designed For HP-Compaq Presario Notebook Series: CQ43-404AU, CQ43-404TU, CQ43-405AU, CQ43-405LA, CQ43-406AU, CQ43-407TX, CQ43-408AU, CQ43-409TU, CQ43-409TX, CQ43-410AU, CQ43-410TX, CQ43-411AU, CQ43-412AU, CQ43-417TU, CQ43-418TU, CQ56 (AMD DDR3), CQ56-102EA, CQ56-102SA, CQ56-103SA, CQ56-104CA, CQ56-104SA, CQ56-107SA, CQ56-109SA, CQ56-110A, CQ56-110SA, CQ56-112NR, CQ56-112SA, CQ56-115DX, CQ56-124CA, CQ56-129NR, CQ56-148CA, CQ56-156SA. 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!