To download the necessary INTERLINK driver you should know the IdeaPad U550 model of your Radeon HD4670 device, and your OS type. A Radeon HD4670 driver for some other operating system may prove to be useless for you. Search engines or popular INTERLINK driver websites can help you in finding Radeon HD4670 file you need. If you have a new Interlink Electronics or outdated Radeon HD4670, we suggest that you use old well-tried INTERLINK drivers thereto, which is helpful for steady NF980-G65 functioning.