Hi!

I am using both GPU for 3 monitors.

Two goes from the Nvidia and one from the Intel. (HDMI to Display Port and HDMI to HDMI for the Nvidia and HDMI to DVI for the Intel)

I ran the test with Support Assistant, the functional one. Since I play video games I kinda don't want to disable my 3060ti.

I will test my PC using only on GPU at the time, but using both will be the best.

Thank you

Nathan 

First, I'd try and discover what those errors mean and which device it applies to? There is a LOG file, at least there is on my XPS, at C:\ProgramData\Dell\SupportAssistHardwareDiagnosticsSubAgent.  You might find some info there.

Second, I'd use F12 on boot and run the diagnostics from there.

Be aware, Nvidia card users are getting Lock ups. Not every one, but many. Dell has NOT fixed the problem.

See if the Solution marked in this thread is helpful...

I will keep on with my test, because I didn't find anything about those codes on the internet.

Thanks,
Nathan.

I got a XPS 8940. I did the F12 on boot with no bad result, I check the LOG files but I find nothing about those codes, maybe RoHe is right, those codes are not that much meaningful.

I will try only the RTX card and after only the Intel GPU.
Thanks,
Nathan.

So I did pretty much all my tests (doing a live stream on Discord from a website that play Lord of the Ring)
Nvidia card alone = problem
HD 750 = no problem
HD 750 plug in and Nvidia only on the computer = No problem so far  
I might try to roll back my BIOS to 2.3.0, but for the moment I will only connect my monitor into my Nvidia card for high gaming.

Thank you!
Nathan

I keep having problems with this same configuration. I'll be doing something that this machine should be able to handle (usually editing in Premiere Pro or Adobe After Effects) and the program will momentary freeze, screen goes black, comes back, video windows are whited out in the program. Task manager shows that each time this happens the UHD 750 3D readout peaks at 100%. Dell replaced the motherboard and it didn't go away. They recommended that I pay the dell software tech people to figure out what's wrong. Would love to find a solution to this. Very frustrating. I bought this machine specifically for video editing and this is a major inconvenience. 

@kmharring  - You don't have any add-in video card, correct?

Which CPU and how much RAM in your XPS 8940?  Are all the drivers up-to-date? Where did you get the existing Intel video driver, from Dell's site, via Windows Update, or from Intel's site?

Any signs of overheating?

Is anything reported in Windows Event Viewer and/or in Windows Reliability Monitor around time of a blink?

And see if there's anything useful here.

Hi Ron! Sorry for the slow reply. I made the mistake of engaging with Dell's chat support team for a few weeks before circling back to this forum to find your reply. Dell's internal team offered me nothing useful, but your suggestion to look to this discussion was a great call. I followed the advice from that thread to do a clean reinstall of the Intel UHD 750 driver, and I also did a clean reinstall of the NVIDIA Geforce driver. After that, the problem was no more. Everything works as I expected it to when I bought this system earlier this year. Thanks again!