asrock killer sli

I’ve updated my BIOS to 5.40 in order to be able to be able to replace my 1800X with a 3700X, following the instructions on https://www.asrock.com/MB/AMD/X370%20Killer%20SLI/index.asp#BIOS Now my fans start spinning up att full blast as soon as I boot, keep spinning at pretty high rate, and...