GrowTFM :
This happens every time it worked on Windows 10 but not on Windows 7 i dunno what's the deal
Well 7.1 requires 8 channels, are you sure that its not repurposing your-mic in as a channel- out?
If you plug a speaker into the pink - does it play sound?
http://www.asrock.com/support/faq/20070116-03.jpg
You'll probably want it set up more like that.