My opinion:
The problem, what I see here is, that all the comments here cannot help anyone nor Apple. Maybe there are 100
people out there having problems, thats all, I cannot asses this by reading this thread.
What I miss is a list of everyone, something like below, of his setup better in a new thread.
And that everyone posts only once to check the quantity of Mac Pro problems:
..... My setup .....
-Problem and how often:
-Mac Pro date of purchase:
-Mac Pro was in service y/n, once, twice...:
-GPU was changed y/n:
-Other components changed:
-System version installed (list if serveral):
-System clean fresh install, SSD initialized y/n:
-System software clean without 3rd party drivers y/n:
-Monitor type and connector type:
-Any USB, HDMI or Thunderbolt hardware attached aside of monitor:
-Test with powered USB hub y/n:
-Test result with no hardware attached:
-RAM original or changed, type and capacity:
-Wifi is on, is off:
-What software crashing or beachball:
-User action at time of crash:
-Fan speed at time of crash:
-Other points of interest:
I personally think, that Apple will not do much developement to resolve problems
other than changing gpu and system reinstall.
Like the Cinema black Display problem or Thunderbolt display problem.
First of all, try to encircle the problem. All this comments here are not really helpful.
When nothing helps, in the US you have a big advantage over much other countries:
Do a class action !
Do it before the Mac Pro will be replaced or production stops.
The Mac Pro is the most expensive Apple product, not a 200 bucks fone for your kids,
and often your daily work depends on it.