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”.
Event viewer doesn’t report the shutdown.
Only on startup it reports that the system was shutdown unexpectedly.
I will try the sugestions of @GoSammy1971 and see what the results are.
The Prime95 test done.
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.
For me it was very likely a GPU temp issue. The voltage that the manufacturer had set was too high, so I undervolted which removed the issue.
For me, lowering global render quality to medium and max frame rate to 20 fixed schutdown issue.
GPU utilisation should be always below 100%.