Yeah, no, I give up
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I am forced to conclude that my motherboard simply doesn't have good bios options for overclocking this chip. There's no ability to specify the CPU voltage, only the offset.
1) stock config, offset -0.072v, bios shows this as 1.2v. Boots, primes all night long with ~1.28v all cores at 3.7, never goes above 67 degrees, but does get xmp spikes of up to 1.519v when doing light tasks.
2) fixed at 3.7ghz, same offset, bios shows this as 1.39v (
why???). Runs at 1.4v all cores, gets much hotter, never downclocks. Windows power plan loses min/max processor settings.
3) using AMD's power plan, never downclocks, up to 3 cores show as running full xmp at all times and volts are almost continuously around 1.45!
3) offsets below -0.072v result in a failure to boot and require clearing cmos.
I... cannot tame these volts with the options I have
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Which is annoying, because I thought the Gigabyte Gaming line was good, and it turns out to lack some real basic controls like
what voltages you want... So basically I've gimped myself with poor choice of board.
Still. It runs. It runs cool, stable, and it's presumably within AMD's tolerances. And it's significantly faster than I thought it would be vs my old 2500k. I should probably quit worrying and just
use the darn thing