After doing some testing with my MMX 300, I'm finding the onboard audio on my Strix Z270-I isn't performing well enough. Getting a reasonable amount of distortion vs using say, a Macbook. In fact, all headphones sound pretty poor through it. Everything sounds harsh, and bass distorts (to the point where I thought it was the headphones, until I tried them with another source). Not looking for anything super amazing, as long as the output quality matches a Mac, and looks pretty decent, I'm happy. Will need to drive 300 Ohm headphones potentially, as looking at getting some HD650s Been trying to do a bit of research myself, but can't find anything. Needs to be external.