Ahhh, that explains the really funny review I saw of Amir with a HT processor or receiver complaining about the noise caused by using HDMI from a PC without understanding how bad a PC is for ground loops.
As helpful as Amir is, and he is a real engineer, there are some gaps.
I have no issues using PCs as music servers, but I use correctly designed isolated USB DACs and "decent" cables. All my system is plugged into the same power DC blocked and filtered power strip. No problems. HDMI on the other hand is a disaster and who ever designed the plug needs a dope-slap. Other than going to fiber transceivers, not sure how to fix HDMI issues.