Does anyone know what the purpose of the Asmedia USB drivers available It turns out my Asus ZA motherboard doesn't have an Asmedia USB controller, 6 x USB / port(s) (2 at back panel, blue, 4 at mid-board)Missing: A55BM- BR. Full drivers, utilities, and instructions list for motherboard Asus A55BM-E/BR. ASUS A55BM-E/BR ASMedia USB Driver 37 downloads. Motherboard ASMedia. Windows 8 64 bit, Windows 8, Windows 7 64 bit.