And I found another bugs with the fans.
If I set the fan speed to 20%, the fans will always spin and stop every 2 seconds.
Some fan speed setting, for example, linear rise - flat - linear rise; the fan speed will run in 100%.
I just bought a GIGA RTX 2080 Gaming OC and I found sometimes the fans spin and stop every 2 seconds. The noise sounds like sawing wood and it’s very disturbing.
I know this is about fan control strategy. But I still fell something weird because this phenomenon happens very frequently...