A bit sad....
Anyway, thanks to @radiovi i solved. I had to disconnect fans from the chassis RGB adresses controller (even if it s compatible with AURA and all the rest, the case is a Sharkoon RGB HEX), connect one by one to MOBO (TUF gaming B760 PLU...
So i restarted after installing (it was a first install for me, and it didn t install fan expert at all, before now)
At start i had all the system fan working, but after setting my preferences, all the chassis fans are magically gone!
If i try the au...