Aurender vs. Roon

Anybody with these dedicated music servers ever compared or done a shootout with a Ethernet-2-USB converter. The reason I ask is that I have a very busy (though audibly quiet) work computer running ROON server and I stream my music to my DAC via a mid-priced Sonare microRendu. No matter how I stress my computer I cannot make the sound on my system to degrade. It seems to me that the music bits over Ethernet are immune to the computer noise with a Ethernet-2-USB converter. I also use ROON's up-sampling because I have the computer horsepower.

My impression was that these expensive music servers being mentioned on this thread are all computers under the hood with a dedicated OS to curb internal noise pollution of the server. Now what if the server's badness for audio quality was eliminated via a Ethernet-2-USB adapter. 

I ain't preaching here just asking since I have not gone down the road of demoing these expensive "computers". Anybody done a comparison?

I will say i recently connected an Ideon Audio 3R Renascence between by Imac and Dac (Prism Sound Callia) Within a short time it dropped out meaning i had to disconnect and reconnect so it would recognize the Dac again. It was also pretty warm to the touch but that was to be expected. This dropout happened several times before i just disconnected it and returned the item. I never had the time with it to experience how much improvement the system gained, too bad. So, all of the talk about noisy USB connections is with merit. On the other hand, i see that Aurender and others have addressed that to some extent, why else would a streamer be a viable choice if the noisy/jitter factor wasn't addressed..   

I bought the Roon Nucleus $1,400 model two months ago.
Paid for the Roon Service and Tidal HiRez . 
If I was doing it again I would have bought the Bluenote? 2i at $500.
Reason, this technology is evolving everyday. I will likely toss this
unit in 2 years when some better more reliable, equipment is available. Not just talking SQ but user friendliness. Seems an issue with something each time I turn it on. And I am ethernet hardwired to the router. 

Most likely user error. Nucleus is pretty much set it and forget it with no maintenance whatsoever 

Question on Innuos Zen mk3. Audio Doctor may know the answer. 

I use a Roon DSP and need my server to be powerful enough to run the various Roon DSP options including upsampling to DSD, EQ settings etc...
Will the Zen mk3 handle this? My current windows based PC does and never drops below 3.2x.  I want to replace it with the Zen for sound quality, but not if the Zen is not powerful enough for Roon DSP.