Hello Kent_M, you will be able to find these settings when you access the BIOS.
Make sure you are running the BIOS version available which is 0021 Download Center
Once you are in BIOS, click on the Advanced tab and at the right hand side you will see these menu.
You will be able to customize the settings.
Hi Sylvia -
Can you please confirm which version of the BIOS has this option? And does it apply to the Intel NUC D34010WYK model?
My Intel NUC Visual Bios looks nothing like your screenshot, and does *not* have the option for "System Fan Control" or Min Temp or Duty Cycle Increment. Please see screenshot below and confirm how we can access these additional cooling options? I have updated to the latest BIOS version 0022.