CPU is undervolted
It's been several years since the 9th gen CPUs were released. Can you recheck with no undervolts?
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silent coyote
Stress tests are kind of like max load all the time. Video games are variable load, and can sometimes expose unusual voltage droop issues
While we're at it, also remove any GPU overclocks.
When underclocking, did you also apply an undervolt?
If this is the case, hit the restore default buttons in MSI Afterburner
underclocking alone without changing the v/f curve is basically wasting power for GPUs
As for the CPU getting 1.4V at 4.7GHz, I'd probably just let the BIOS defaults take temporarily for testing purposes.
V/F curve is modified
Please revert to true stock
basically, UNDO everything you did
no overclocks, underclocks, and voltage changes until troubleshooting is done
Note: sometimes, Afterburner changes can somehow persist even if the app was never run again. You should consider temporarily uninstalling Afterburner, and then performing a DDU and driver reinstall.
silent coyote
Run the Power test for me
(Stability tests > power > run it for 1 hour. Also take note of the +12V voltage)
silent coyote
yeah
if the computer shuts down, or the +12V voltage goes below 11.4V...
getting closer...
now attempt to run the 3D Adaptive test
starting to look like GPU failure.
(It probably will freeze. Next, confirm that the CPU is working correctly by running the CPU test.)
silent coyote
Hmm. Now see if you can reproduce the system instability with the GPU completely removed.
silent coyote
The video card needs to straight not exist for best results