Hey, so the reboot issue sounds a lot like a recent problem related to monitoring software causing codes like those if you used them in the last session before reboot.
In the BIOS there is a recently added setting "Monitoring Software reboot Workaround" (use search in bios to find it) to attempt to fix this for folks. Set to enabled and see if that helps you.
Seeing as loads of random vendor software for common enthusiast hardware (icue, nzxt, l-connect etc etc; different overlays and all sorts of things including hidden background services) as well as obvious candidates like hwinfo can trigger this, its worth a go. The 0d code especially is indicative of it AND that it appears on restarts. So I have a very strong suspicion this might be it...
Definitely worth trying in case this is your issue. There are many reports of this solving 0d, including a few on x870e.
As for the memory not reaching higher clock speeds -- well, obviously that could be many things. But I'd mildly suspect the RAM itself a little more (and I mean a little). Dont change too many things at once, and only try this after you've verified if the above fixes your reboot issues or not: but I'd probably try them on 1.4v to see if that gets them stable at whatever the 6000 profile is. Assuming the expo profiles are 1.35v? Need more details on the profile options.
