On a job site on my horribly laptop so my update is copy and paste from my reply to support last night. The TLDR is I believe to have the issue fixed, but having done so many things at the same time I cannot pinpoint which thing in particular fixed it (or made it so I could at least finally fly for more than 5 minutes).
My last reply to support-
“I did three tests tonight and had one crash. Formatted this weekend, fresh windows install, deleted cloud saves via cmd prompt, reinstalled msfs. MSFS is currently vanilla - No overclocks (not even memory xmp) - No mods - No RGB software - No monitoring apps (like Afterburner, GPU Tweak III) No addons (not even the world updates) - And definitely no ASUS Armory Crate - NVIDIA Studio Driver 591.74 (was previously running 591.86 Game ready driver). I do much more video and music production so tend to use the studio driver anyway, so doubt there is an issue with 591.86. Did some major mods to a duplicate case to improve my GPU sag bracket and added a sag stand (The Matrix 5090 is an oddly weighted beast). I also made some chassis mods to allow a better AIO that I can now fit perfectly. All hardware was transferred from the other case to my newly modded case, thus also taking the steps to re-seat everything. Lastly, my motherboard (x870e Extreme) had yet another new bios (3 in one month), so I flashed my bios again with the latest.
The flights -
1- KPIE - KRSW: Frame rate locked at 40 - 4k resolution - 1 monitor - Default Ultra settings (meaning MSFS defaults me at 200 LOD and all Ultra settings, so I left it like that for all tests, although I tend to tone them down, and never run it so extreme).
2- KJFK - KBOS: Frame rate unlocked - 4k - 1 monitor - Default Ultra settings - Game crashed 30'ish minutes in with the typical "dxgi_error_device_hung (0x887a0006)".
3- KJFK - KBOS: Frame rate locked at 30 - 2k resolution but added back my other two monitors, so 3 monitors @ 2k - Default Ultra settings - Departed at 5pm to go into dusk and then into night - perfect flight. Not even a stutter, just some screen tearing since V-sync was off. I also downloaded the C172SP and used my favorite steam gauges for this flight.
Now that those test flights are complete, I will do as I tend to do and lower a few settings and start bringing back in my 2024 addons, like Navigraph, Chase plane, FS Realistic plus etc, and as I’ve done since FSX, keep a complete install log and diary of any hiccups between new additions.
I’m including a new MSINFO.nfo, AsoboReport-Crash and MSFSReport. At this point, I would consider it resolved for me, but will let you make the call and am fine with doing more testing if needed. I still believe there’s a bug to only get the dxgi_error_device_hung in MSFS and not in games that have brought my temps much higher than MSFS 2024. One thing that will always bother me though, is even after a proper uninstall, following the guide put forth by Asobo, that there were so many remaining things that had to be done for the “Correct Uninstall” to be accomplished. The potential for cloud saves to wreak havoc on ones game shouldn’t exist. During uninstall there should be a message that asks the user if they want to remove everything, to include deleting all hidden additional Microsoft.Limitless_8wekyb3d8bbwe folders and files. Nothing should remain in appdata, nor the windows registry. The xbox app and the MS store should also be fixed if they’re not properly uninstalling. Steam does a much better job since it prompts you for other data removal as all uninstallers should”.
I have to get back to work, but will at some point post everything support had me do to the xbox app, dos commands and powershell commands, such as how to delete cloud saves. Note that at no time did support mention other lingering folders and files that we all know remain, despite me asking several times. I eventually ended up letting them off the hook from answering because of my 4th format and reinstall. Only thing I did different at that point was deleted the cloud saves as told. In my opinion, it was the cloud saves causing my issue, because each resinstall of windows, I also ran every benchmark imaginable, plus Avatar and Cyberpunk at max settings without issues.