Hiya Pat,
Except for the Mac Pro, Macs don't use graphics. cards these days.
I'm on the road w Los Lobos, so using Macboook Air and just going with no ensemble, just MXR Main. 1.25 hour show takes around 45 min to process. In this application, I'm recording omt4 with mk41s x/y PAS in the center, and mk22s 4' spread. I'm not too picky about extraction in this case, as I'm pulling the vocals from the 41s to mix back in in parallel with the 2 stereo tracks, a variety of vocal sweetening.
Here's a track from Thursday night:
https://archive.org/details/LosLobos2025-01-06/ll20250206.OMT4.2448-02.flacThis is my current state of the art, combining AI extraction with omt4 recording. Fun times.
Not very good picture attached showing omt4 boom at the triple door in Seattle.