The testing on of the E10 would indicate that this is way better then the mobo (if I read it right) - http://nwavguy.blogspot.com.au/2012/01/fiio-e10-dac.html:
- Freq. Resp. 10K = +/- 0.1 dB A
- Noise A-Wtd dBu = -98.3 C
- -60 dBFS DNR dB = -97.6 C
- THD+N 0 dBFS 10K = 0.005% A

HT:M80,VP150,QS8,EP500 Outside:4xM3 Office:AudioBytes, Rumpus: M60,VP150,M22 Portable:2 x Airs