For what it's worth, i thought that my X2 sounded better with my clip+ than my on-board (i did say night and day differences...), after some test i figured that it was my imagination.
I do have some little EMI interferences from my graphic card (or PSU, i don't know), when used at it's "near-maximum", especially when i use MadVR. (like 90%+ GPU use), but if i don't use my GPU, or don't use it that much (like League of legends, CSGO, ect), i don't have any EMI sound (or at least not noticeable at all) on mine.
And it's not the audio chipset, from front audio jack i don't have theses EMI interferences, maybe my cable isn't that great (it's a kabeldirekt that somebody recommended, don't remember the thread). I don't know.
(If somebody have a solution, don't hesitate )
Some motherboard also come with great tools (mine come with a Sound Blaster X-Fi MB 3 app) that can do some good stuff for music/movie/gaming.
(I love this this "game" preset so much that i also listen to music with it and movie now).
TL;DR : Wanted to buy a dac, and finally, i decided it may not worth it.
I suggest you to test with your on-board audio first, and why not, with other source you have, and make a decision. ;)
Edited by Sunrider6 - 3/22/15 at 4:16pm