Today i did an clean install of Win8.1 64bit and im expiriancing problems with the 5.1 suround. Before this i had Win7 SP1 64bit, everything was working fine. When i installed all the drivers i tried to configurate them in control panel, but there was no rear speakers. Only side,front, and center with bass. I had to change to 7.1 to enable rear speakers, but the sound is not good, its not clear and its wierd. Speakers are ok, they are not the problem. One more thing. When i tried to enter in this: http://www.sevenforums.com/attachments/sound-audio/171335d1379301293t-realtek-hd-audio-non-working-rear-speakers-capture.jpg only the green one worked, other two no. Anyone knows the solution for this kind of problem? Thanks in advance