2GB DDR2-800 (PC2-6400) RAM Memory Upgrade for the Compaq/HP CQ61 Series CQ61-411WM (WA980UA#ABA) Notebook/Laptop When you purchase 4AllMemory RAM, you are safe knowing that your investment is backed by a lifetime replacement warranty and United States based telephone technical support available a phone call away! Put your trust in a company that has been in business for 12 years, not some fly by night seller you won't be able to get ahold of! 100% Guaranteed Compatible for the computer listed in the title of this ad