Did a little out of the case fan fun. Basically, I was looking to see if they all worked. They did. The fans have 3 modes that they use. Hybrid, performance, and advanced. I'm not going to do hybrid because I have software that runs my fans. So, I totally disregarded that mode. Performance mode sets the max fan speed at 2000 RPM. Advanced allows for 3000 RPM.
These fans move a lot of air and does so pretty quietly. Way more air movement than my gentle typhoons and a little more quietly.
I think I'll keep them in the 2000RPM 'Performance' setting because I like the sound levels that they have and the airflow. It's a good balance.
I think I'll be putting these in when I put my active backplate on my 3090.