Question Asrock X670E Taichi doesn't detect fans in BIOS

[Joel1]

I recently swapped out my Gigabyte X670E Aorus Master for an Asrock X670E taichi. It seems to have trouble detecting all of the fans consistently. I can see all of the fans (usually, but not always) spinning while it's memory training at code 15. Then it goes into the BIOS and the fans stop and they don't show up as detected. It's not always the same fans that work or don't work, but some seem to work more of the time than others. This is very strange as these fans worked just fine on the gigabyte board. Does anyone know why this is? To add to this weirdness, in the BIOS when I clicked on "fan tuning" to try and force it to try and detect the fans, the first time this worked and magically all fans show up in the BIOS, but this didn't appear to stick around after a reboot and subsequent attempts at doing the same thing were not successful. I was also previously getting error code 0d before the post. Re-installing RAM and GPU seemed to fix this although it's too early to tell.

Things I've tried:

1. Clear CMOS
2. Update to most recent BIOS
3. Unplug and plug back in all the fans
4. Remove SATA drives
5. Re-install RAM
6. Re-install GPU
7. Check for visibly damaged fan header pins. (Don't see any.)

my setup:

Asrock X670E Taichi
CPU: Ryzen 9 7950X
GPU: RX 7900XT
power supply: Corsair HX1000i
SSD: Crucial T700 1TB, Samsung 980 Pro 2TB
SATA drives: Samsung 870 Evo SSD, 2x Barracuda 8TB HDD
Cooler: Noctua NHD-15
Fans: Be quiet! silent wings 4 140mm high speed PWM
case: Fractal Design Meshify 2 XL

Any help would be greatly appreciated. Thank you.

 

[Lutfij]

When you swapped motherboards, did you reinstall the OS? Clear the CMOS after you've verified that the BIOS was flashed successfully.

 

[Joel1]

When you swapped motherboards, did you reinstall the OS? Clear the CMOS after you've verified that the BIOS was flashed successfully.

I should have mentioned, I’m running Linux which doesn’t have to be reinstalled after swapping motherboards. That’s a windows-specific thing I believe. I do have a blank SSD I could use to see if that makes a difference. I have cleared the CMOS several times since flashing the BIOS. I can’t remember if it was the first thing I did after flashing it though, if that matters.