You realize that if you set ANY fans to over 2000RPM it will be crazy loud, right?
The H100i allows you to modify fan speeds by specific RPM that you can set manually, or select 1 of 4 included fan speed curves, or create your own.
At 1200 RPM the fans are virtually silent, and my 4790k idles around 23*. Rarely does it ever get into the 40s.
This is coming from someone who owns and uses the product.