Got my new CPU today and Classy 4way works fine - so it verifies the dead CPU. :(
Must have been VTT. I reviewed my memory of voltages when looking at BIOS and nothing was close to out of line except for VTT.
The VTT "vid" on this retail chip is 1.25v. 100mv more than I assumed.
I was giving the dead 980x a VTT of 1.65v. Ignorance can be deadly, I guess.
Nobody's fault but my own.
I'm gonna go slow and post some info on this retail chip later.
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It exists!
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