After my W5700X went walkabout and TNT misplaced it for about a week, it arrived, is installed, and I even admitted to my wife that I bought it (she remains unconvinced this is a "gift" for "us").
I had the Thunderbolt pop up annoyance, so, did the supplemental update for 10.15.4 again and that cleared that up for now. Not quite wanting to jump onto the Beta Train for this machine, but it's good to hear that 10.15.5 is looking stable.
However, now I've got the 580X sitting in the box the W5700X came from...is there any reason NOT to install it in the MacPro and use it as well? I see plenty of others doing something similar with Vega IIs and the W5700X, but, not sure if there's a downside to having both the Radeon W5700X in the system at the same time as the 580X.
I know that it's likely going to be software dependant as to whether or not things are taken full advantage of, but, I'm wondering if anyone has done this and actually noticed that it's a BAD thing to do (like, for example, macOS somehow preferring the 580X and not getting full benefit from the W5700X for rendering time or whatnot).
Would be great to know if this is a really bad idea before I open it all up again...