New
#11
What I did was to set it to 5.1 speakers first and then enable the 7.1 virtual speaker setting. That is where you have to be to be able to "move" the speakers around. That makes it so that the headphones are muted and the speakers work.
Then I just switch between speakers (set to 5.1) and headphones depending on which I want to use at the time, and enabling the 7.1 virtual again (for whatever reason that check box doesn't stick when you switch).
If you have a 5.1 set of speakers you will lose the rears doing this as the card only supports 5.1, but it saves having to switch plugs back and forth. And as I said you still get to take advantage of the built in headphone amp, which doesn't work if you connect the case front panel to the card and connect the headphones from there.