I know FN and TAB are designed to lock the side touchbar and the TAB light turns white.And it works as intended but I can't seem when I press FN and TAB again to bring it back to normal color TAB still stays white.

Hi, I have an old 5.1 setup, now that the new series of MOBO's only have one audio out, I'm forced to try and use the optical out solution.But i've read that the optical out is only in stereo?How do I hookup my old 5.1 with the new x870 boards?Thanks