If you use Afterburner and try to adjust the fans, it would be stuck at minimum fan level (30%). A work-arround would be to adjust the minimum-temperatur when the fans should first start to spin... but again: you cant do that because as soon as you try to adjust in afterburner, the fans are stuck at minimum level (30%).
so only if you let it be controlled by the original Bios of the card, you have the zero-fanspeed active in idle, but not when the card goes over 47°C and that happens (at least for me) every 5-10 mins.
also the override function afterburner doesnt work, tried every function in it - nothing works.
see the dotted lines in afterburner (they are the minimum and maximum for the card):
https://i.imgur.com/5l1NMSZ.png
but again: that would be just a workaround and actually not acceptable for a +2000€ graphicscard.