Asus q550lf driver download. asus q550lf driver download for windows 8.1 64bit windows 8 64bit – spec asus q550lf : processor intel core i7-4500u 4th gen haswell dual-core 1.8-3ghz 4mb cache, vga : nvidia geforce gt 745m / intel hd graphics 4400,15.6-inch ,screen resolution 1920