Are you running with the HD750 or the Nvidia card connected to the monitor? If the HD750, did you DISABLE the Nvidia card? What test did you run?  
[IMAGE]   Hi! Like many of you, I got freezing issues with my XPS 8940 with a Nvidia RTX3060 ti, I got the mother board replace and I ship the computer to a Dell repair center last week, but still those problems comes back.  I am using the base configuration (1 stick of 16 gb of RAM, did not change any setting) but after loading back my personal files, my apps and after doing the update my computer freeze again. I wrote an email to Dell and they say that they will look up for my problem, but this is very annoying to weekly reinstall Windows and setting the whole thing back again.
XPS 8940, Intel UHD 750, errors and freezing issues