Did you read the manual? The manual tells you how to adjust this kind of stuff. Kinda...

Let us know what your current setup, settings, and relevant temps are. The ambient air operating temp range is important to know as well.

Personally I've found that I had to set the Reference value and Max limit with-in 2C of each other. In my instance it allows my system to run quietly in almost all occurring ambient room temps and respond properly to heavy loads. Some lag in the response is okay though. One of the virtues of water cooling is the capacity to absorb heat without immediate faster fan response.