Dear All,

I have experienced similar difficulties regarding the temperature-dependent control of the CPU fan speed, as other users have reported.

However, after playing around with the settings I have noticed something odd.

I can control my chassis fans with the A-Tuning software and the "MB Temp." setting successfully.

But as soon as I change the CPU FAN 1 to be controlled by "CPU Temp." instead of Tctl (which is quite bouncy), the CPU FAN 1 doesn't seem to react to the temperature any more.

It always runs on the same speed.

Therefore I installed HWinfo and found this out:

If the CPU FANs are set to Tctl, the mainboard provides a correct CPU temperature:

https://i.imgur.com/QU42Fez.jpg?1

If you now set the control parameter to "CPU Temp." the mainboard now provides a wrong temperature: -73°C.

https://i.imgur.com/x9bcxvx.jpg

This explains why the CPU FAN 1 doesn't react to the CPU temperature any more, as is assumes it is way below the curve settings.

This seems to be a software bug, I hope that this post will get some attention from the developers.

If you have the same issues with your Taichi boards, please let me know.

Regards

DSLeX

Mmm, nope. Try here http://event.asrock.com/tsd.asp and here https://www.asrock.com/support/index.asp?cat=RMA (no matter if you're in the US or not).

DSLeX wrote: If you have the same issues with your Taichi boards, please let me know.

I use super quiet Noctua fans and I use Tctl. This way I don't mind the RPM changes, although your case looks like a nasty bug.

As a workaround you can set constant RPM to this fan, especially if you're not overclocking or if you're not in a hot room/climate.