new um2 fan problem

[david-ganon 2]

it seems that the fan start working only when they get above 70-80% power.

until then, they do not move at all.

do i have a problem on my machine ?

 

[illuminarti 16]

No, it's fairly normal for these fans to resist starting at lower speeds. The firmware should do a better job of kickstarting them. Usually if you just get them started by hand they will spin up ok. But to be honest, you really only need to run them at full speed for most things.