It is easy enough to optimise Windows to be bit perfect without using Fidelizer, but in terms of Apple vs. Asus, set up properly, there will be zero difference. What is more important to sound quality is the USB front end whether internal or external to the DAC unit. This *does* make a big difference!
Mana Acoustics Racks / Bright Star IsoNodes Decoupling >> Allo DigiOne Player >> Pedja Rogic's Audial Model S DAC + Pioneer PL-71 turntable / Vista Audio phono-1 mk II / Denon PCL-5 headshell / Reson Reca >> LFD DLS >> LFD PA2M (SE) >> Royd RR3s.