Shutdown is often an indication of hardware especially the PSU and not software.
When I was running this sim in 2020 my PC would regularly shutdown but every other game or sim would run without issues.
I bought a quality Seasonic platinum PSU a bit pricey but completely fixed the issue.
I have tried different brand PSU including a Corsair gold unit and those would still power down when the game ran under full load.
Since it never did something like that on benchmarks and Warzone at epic/ultra settings i never thought of still a HW issue. I will go to the store tonight and go for a 850W PSU instead of a 550W.
I have changed my 750w for a 850w and issue was fixed. Maybe 750w would have been enough and it was more related to aging but I went for more and quality. Probably is very high that it is your PSU.
Check your Event Viewer and verify that you’re not shutting down due to a 0x0000116 video error. I was getting those about four times a week, and when they occurred, my PC shut down. After working with nVidia and ASUS, we found that the card was bad and I got a replacement (fortunately it was under warranty).
I have a very similar system, with a Ryzen 3800x, Sapphire Pulse 5700XT, and crucially, 32 gb of corsair RAM. This same issue for me annoyed me for a few days last May and I stopped playing MSFS for a couple of months because I assumed it was a buggy update, but it was, in hindsight, the first sign of my RAM stick failing. I even tested the sticks with memtest86 while troubleshooting MSFS, but only for 4 hours each, finding no errors, but maybe six weeks later the problem spread to CTD’s and BSOD’s from Chrome, Office, and almost all other apps, usually with “memory management” related codes in the BSODs and event viewer logs. I lost my mind for a little while because I thought I had tested the RAM and that wasn’t it, but after a week of swearing at it I did another memtest, and errors popped up immediately and everywhere. Corsair honored the warranty, and after a lovely month waiting on the boat from Taiwan off of Long Beach I got a replacement set in September. Since then I’ve tested another old faulty RAM stick from a dead old PC (which is bootable, but crashy) and found the same situation replicated for me in MSFS: no other programs had any issues besides a couple weird refreshes in chrome, but MSFS BSOD’d at best, and shut straight down warm at worst. I don’t know what, if anything, about the program makes it particularly sensitive to RAM errors, but it definitely seems that way for me, and a very similar problem was definitely the first sign of my RAM failing in hindsight
After an MSI update on 18th januari I tried again. i was able to play the game for almost 6 hours straight. I flew 4 differtent planes accros europe.
beside the caching, I didn’t do any settings or additional downloads.
After the 6h flights I decided to start downloading all WU’s and 2 planes I bought.
And actually as the issue started in the first time. 5-10min. into downloading the WU’s. My PC shutsdown. This is actually the exact same as before.
I didn’t mentioned it the first time because after reinstalling Windows and the game, it still does that.
I was thinking it was not related. But now when it happens the second time… Uhhmmm …
I also checked my RAM. All fine there.
I had some termal issues on CPU. But that’s also fixed. Replaced the thermal paste and temps are good now. (lower then spec)
My top guesses are either something overheating or a faulty PSU, but since you swapped that already I’d say its more likely to be something overheating. Check the system tab in windows event viewer and see if it has any info about the shutdown. If its a thermal shutdown it should say something about “Kernel-power ACPI thermal”.
After 5h, no error’s or warinings.
Check via taskmanager CPU and RAM was always around 98%
Also had a YT video playing to prevent sleep mode.
Tonight i Will do some analyzing from logs that i made on last crash. (HWinfo).
Event viewer reports nothing, just a unexpected shutdown. So far I know MSFS doesn’t have any logging.
Sorry for bringing a thread back from the dead, but wondering, did you find out in the end what was it?
I am still having this issue AFTER HALF A YEAR. I am on similar specs (3700x and 5700XT) and i am having hard shutdowns only in msfs. I swapped to new psu, new motherboard, new ram sticks. Did a complete windows reinstall, tests, etc etc you name it. I’ve wasted so much time and money trying to make msfs work and still nothing… tried yesterday with latest updates hoping issue is gone but it still shut down.