One 3.5mm port only delivers two audio channels.
If you are so interested in APU, why even bother dedicated video card? APUs are for those who intends to NOT use dedicated video card. Consider FX or Core i3 if you want to use dedicated video card.
I have a APU in my current desktop this way it would save me money and I'll be able to upgrade to a video card down the future since they aren't that great.