I have a MSI Gaming X Trio 6800 XT and a Samsung Odyssey G9 (firmware M-T9549GGAA-1009.0). I am on Windows 10. My system periodically (after anywhere from 10 minutes to 6 hours of being on) black screens and it is completely unrecoverable (but the fans keep spinning). I have to hard power off the system (holding the hardware power button) to restart. I am experiencing this on driver versions 20.11.2 and 21.2.1 and have been running the monitor at 120Hz with adaptive sync on. The most recent crash, on version 20.11.2, also caused the fans to ramp to full but this is not the behavior I have normally been experiencing.
I just installed the new card and monitor on Friday and have been experiencing this issue continually ever since.
I should also note that it isn't a thermal problem. I've run a GPU stress test (FurMark) which keeps the card pegged at 98-99% utilization and the temp is completely stable at about 71 deg C, 93 deg C junction temp.
Also, when the crashes occur, I can usually continue to hear sound from the system (music, game audio, discord) for 2-5 seconds (or so) and then it cuts out as well.
I tried to use the driver's built-in Bug Report Tool and after filling the form out, during the step where it said "collecting system information" or something like that, the crash occurred again.
It has been happening both in game (Valheim) during game launch (Assassin's Creed: Origins) and out of game.
I tried a completely fresh install of Windows 10. I installed the drivers using the autodetect tool (picked 20.11.2) and rebooted the machine. Within 5 minutes of logging back in, black screen and crash. I've tried freesync on and off, no difference.
I am starting to believe there is a problem with these screens (mine is a C49RG9, not the same as yours).
Not sure who should fix what, but looks like driver companies... as if I run the screen from the CPU Graphics, it never has problems.
I am almost positive this is a driver problem or compatibility with these screens. Lots of people complaining about this.
Although, I would recommend you to use the AMD Driver cleaning tool (that removes all drivers in safe mode) and then re-install to confirm that is still not solved or not.
For me, it was exactly like you, and then, after doing the cleanup, it took 2 or 3 days... but would still freeze.
Currently, I am testing having the card installed but without any drivers (windows does not detect it) to validate the card has nothing that could be causing the system to malfunction (electrically). This is because the store tested the card for 2 consecutive days, but finding what I found, I wanna make sure my way too.
Another thing that I have not yet tested, and would appreciate if someone tests, is to disable freesync on the monitor and card... and force running both at fixed refresh.
Hopefully, there is enough evidence to AMD that there are still problems with these screens + GPU combination.
I have the same problems but running with a msi mpg341cqr ultrawide screen, can’t get any DP port to run without black screens and crashing but hdmi will run stable without crashing when changing the pci slot the gpu is in from gen 4 to gen 3 in bios. Mine is a total new build and have encountered these black screens as soon as try logging into windows from start up. Im going to borrow a mates gsync monitor to try that out today and see I get the same problems but with researching forums it seems it might be a ultrawide screen problem with software compatibility.
I encounter the same issues, but with an old non-FreeSync/non-Gsync 144hz 1080p panel and a 60hz 1080p panel.
I ordered a G7 Odyssey but having the problems already. Seems pretty random when it occurs, but Im having a hard time tracking each single time down, since it happens maybe once a day and Im pretty sure it happened once when on desktop.
The other times it was while playing WoW.