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ManofGod1000, do these problems manifest themselves only when overclocking or also at stock?
Man of God, on the B450 board, you never answered the question about VRM temps. That could be why it always shuts down at 82c - in that at 82c CPU temp the VRM also has reached a certain temp that causes the motherboard to shut down in order to protect itself. HWInfo64 displays a line in the motherboard section called VR MOS. I suggest you check that out. And putting a "spot fan" to blow on that area can really help that issue if, in fact it is the problem. So if we knew that your VR MOS temps were high we might have an answer to that shutdown at 82c CPU temp.
Also, could you take the time to create a Signature that lists your system components. Then that information would travel with every post you make and we wouldn't have to keep reread the thread to refresh our memories. Go to Settings and Edit Signature.
Also, pics of HWIinfo64 with system under load just before shutdown at the 82c CPU temp would be very helpful. You can do image capture form the screen with Windows Snip n Sketch tool and attach them to your posts with the Go Advanced tool at the lower right corner of every new post window. Then find Manage Attachments.
Which board are you using now? Beware that motherboard manufacturers tend to abandon bios updates for lower end older boards after about 6 months or so after debut. Adding a little voltage to the RAM to make it stable at advertised speeds is an easy harmless fix. What were the other bios issues your were having on that board? I've lost track.
I think you accidentally pasted system 2 onto system 3. But yeah those fatality ITX boards are not the strongest VRM wise. If you switched from liquid to air though, that probably helped the VRM. If the problem is gone then all good I suppose .
Also you could put all those in your signature with a small enough font