MacPro6,1 Kernel Panic - Machine Check Architecture (MCA) Several times a day

I saw no amazing insights hidden in those reports.

Have you run the diagnostic on your Mac?

MCA = Machine-Check Architecture is a way to report Hardware malfunctions.

One possible malfunction is a memory problem. This article applies to MacPro with Xeon processor like yours:

User Tip: Mac Pro and Error Correcting Co… - Apple Community

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could you also please post a kernel panic report?

Kernel Panic Reports are stored in the Folder at:

/Library/Logs/DiagnosticReports

If you copy and paste that string into:

Finder > Go menu > Go to Folder

it will take you to the Folder where those reports are stored.

Kernel panic reports are named with Date&Time and start or end in ‘panic’

If you find one, please post as much as you can here, by using the “additional text” Icon in the reply footer (looks like a paper with writing). (Once the report devolves into incessant software-names or incessant Base-64 dumps with lots of AAAAAA lines, you are done.)

Please don’t post more about 20 lines of any other types of reports — they are interminable, and any information useful for this purpose is on the first screenful.

If you post your kernel panic here in its entirety, using the additional text icon in the reply footer, we do have some Readers (typically with developer background) who can attempt to interpret those panic reports. Even if no clear symptom emerges, this can still save a step if you DO need to contact Apple support later, because Apple Support specialists can read the panic reports you posted here, if you tell them what discussion or what Avatar.

ZzyzxOh wrote:

I ran an audit of twenty (20) machines and 19 had Boot ROM 481.0.0.0 and this one system is 429.60.3.0.0

Version 426 is installed with MacOS 10.11 .

Version 430 is installed with MacOS 12.4,

and since the firmware store is a private store on the processor, not on any drive, that firmware, once installed on that specific Mac lives on.

ZzyzxOh wrote:

I have started with a clean install of Mojave and am working my way through Monterey now. If I can not get an Update to change the Boot Firmware, I would wonder if that means I need to replace whichever board that is on?

No.

if it won't update macOS, you look in the installer Log (check the menus while still inside Installer and 'show log'. the look at the Error messages for the reason why.)

Muttering about private storage on the processor card.

Wait, maybe you are onto something...

Your kernel panic reports seem, well, garbled. The way it works is, when a panic occurs, the binary data gets dumped into NVRAM, and after a Restart the stuff in the NVRAM get pulled out and formatted into a human-readable report. But when attempting to read your formatted reports, they are barely readable, with substituted characters all over the place.

I don't have a punchline, they just don't look right.

NVRAM problems are not common, but they are possible.

try your Etrecheck report again, as it did not appear on the forums.