Just want to chime in about the B660I. I have this in my ITX build.
With 12700K
Firmware 1003 (same firmware as DeBauer video)
Firmware 1401 (latest as of right now)
Neither will show the manual mode under Ai Overclock drop down. Always Auto, XMP I and XMP II. Never a manual so BCLK setting never shows. This is true even on my K-Chip.
The board is excellent otherwise, and just remember to disabled all PCIE settings to avoid the WHEA 17 errors. Other than that it's been a great board, just no BCLK overclocking on either K or non K chip to be expected. Since I'm on an ITX build, Im going the other way. All core 4.7P 3.6E is the max the board will allow manually, but Im running stable at 1.21Vcore and it's super quiet and cool. I believe I can keep dropping the Vcore further.
