Hello!!!
it's very interesting what you said about your build for live performance(vst server pc) !

would you tell us why you chose AMD Ryzen CPU instead of Intel ?
are there any pros on Ryzen side?

and

which motherboard brand is better for such a build?

I'm going to do the same.
and this topic is also important for me... which of RME PCIe cards will be better for this purpose.

Is RME AoX M\D would be better choice than HDSPe MADI ? (for live DSP\VST\PC server)

Wow! your blog is a godsend! Love these types of reads.

The thing about latency for live performances is that it adds up in stage productions.

The latency of the electronic drums look approximately like this with one of the artists I work with.

3 ms: trigger response inside of eDrumin module (using multi-zone drum triggers)
3 ms: MIDI transmission over network (midi from module to iConnectivity mioXL also adds a tiny bit on top of this)
4 ms: output latency (core audio) of RME digiface dante inside ableton (128 buffer size/48 kHz SR. This is omitting the input latency since audio is not being processed).
0.25 - 1 ms: Dante connection (Dante to madi through ex.box
0.8 ms: RTL of Dlive monitor mixer.
1 ms: PSM1000 latency using analog inputs

The values above are all estimates. On top of this I'm sure a couple of ms get added due to AD/DA and digital format conversions.

Total latency guestimate: 13-15 ms

At these latency times the drummer will start to feel the latency when playing. Small reductions of latency at all possible stages can let the performer get out of the "uncanny valley" so to speak.

As I mentioned, there are more places than in the audio interface where latency can be cut. Midi transmission, for instance, is one of them. Directly connecting the MIDI-device via USB to the host computer is the fastest in my own testing.

There is another aspect of audio interface performance and that is the fact that better latency/performance can let me use a higher/safer buffer sizes in a CPU-heavy project before the drummer starts to feel that the triggered sounds are sluggish.

I think it's most likely that I'll get another MADI FX but was curious if any other interfaces have the same crazy performance.

@FullScale
Most of your latency is due to other causes than audiointeface. And the latency of audiointerface is mainly due to buffer size needed. You need either stronger computer (or better optimized the one you use), or less heavy Ableton projects (or better optimised).

You may save 3 ms on MIDI transmision and up to 2 ms using smaller audio buffer. Every 48 samples of buffer add 1 ms to latency.