@high-amp What is an electrically noisy computer doing that is bad? It is sending that noise into the DAC. Now what if you block that noise from getting into the DAC. Some magic shield. I use the following:
Amazon.com: Ubiquiti Networks Networks UniFi Switch 8-Port 150 Watts, White : Electronics (you can get this from Ubiquiti for $199)
Sonore - opticalRendu (I have 2 of these for 2 DACs)
Fibre Optical cable cannot carry the noise
BTW - my noisy computer is wired by Ethernet and hidden in the closet of a bedroom, no where near my office or living room systems.