MSI B550 A pro i think - or some variant of that (wifi? wifi+?). He upgraded to a 4070 had a 5800x3d- weird black screens and freezing watching videos, crashing out of games, not coming back from sleep, we spent a few weeks troubleshooting it and found a bunch of other people reported the same things...
He used it as an excuse to grab a 7800X3D that he 'definitely' needed lol.
Point is weird interactions like that with hardware happen all the time - there was nothing wrong with any individual component but you put them all together and boom - disaster, maybe it gets fixed, maybe it doesn't.
That's a whole lot worse than my ASRock B550 PG Velocita, and I wondered if it was buggy. My problem early on, wasn't crashing in games or tasks, except that there's a good chance that Edgium takes down Windows 11 with the "blank screen with monitor backlight still lit" bug. Never happened with Firefox. But, I never had that issue with Ryzen 9 5900X nor my Alienware AW3423DWF OLED monitor.
Was it a bug with AMD drivers with RX 6000 series and possibly an interaction with Samsung monitors? Another person showed a blank screen on a Samsung monitor as well.
I also randomly got the same kind of crash when changing the refresh rate in Windows 11! I haven't seen such in many, many months! It seemed to happen more in 2022 and maybe earlier 2023.
It's extremely strange! I also never recalled a crash like that with the first 32 GB kit taken out and 2x8 GB installed! That was with a "regular" 5800X. I suspected a bad IMC on it.
The same RAM works OK, even with XMP on my Asus ROG Strix B550-F Gaming and 5800X3D! (Trident Z Neo 2x16 GB 3600 kit)
I took the RAM out of it on May 18, 2023 after I unexpectedly got "MEMORY_MANAGEMENT" BSOD with the "regular" 5800X.
I never got crashes with the Asus ROG Strix B550-F Gaming + 5800X3D.
I must add that the odds of AM4 being buggy, decreased with later BIOSes.
Socket AM4 is today's version of socket 462! It's like socket 462 20 years ago.