I see no reason to run fans at 100%.
With all my cards i find a sweet spot....i keep the temp monitor open and find a balance between cooling and noise. Ambient temps make a big impact on cooling, i have to shut half of my cards down at night because my room gets too hot.
When i move into my own place, ill be able to run the ac colder and wont have to shut the cards down. And if you notice, once you go past 60% the cards really dont cool any better, all youre doing is moving around hot air.