New identical builds both have fans at constant full blast.

[relo999]

Hey,

Today I build 2 identical builds and out of the 3 casefan headers 2 are constantly at 100% power. I've installed the latest BIOS of the Asrock motherboard.

The builds:

ASROCK B650M PG
AMD Ryzen 5 9600X

16GB Crucial Pro Overclocking
Lexar NM710 1TB
MSI MAG A750GL PCIE5
3*Noctua NF-A12x25 PWM
Windows 11 Pro

Header 1 and 2 are constantly at 100%, Header 3 seems to be fine. Both PC's have the exact same issue.

[strange13930]

1 hour ago, relo999 said:

Hey,

Today I build 2 identical builds and out of the 3 casefan headers 2 are constantly at 100% power. I've installed the latest BIOS of the Asrock motherboard.

The builds:

ASROCK B650M PG
AMD Ryzen 5 9600X

16GB Crucial Pro Overclocking
Lexar NM710 1TB
MSI MAG A750GL PCIE5
3*Noctua NF-A12x25 PWM
Windows 11 Pro

Header 1 and 2 are constantly at 100%, Header 3 seems to be fine. Both PC's have the exact same issue.

are the fans set to max in the bios?

[Mark Kaine]

Sounds like you just didn't set the fancurves...you also may have to switch modes between DC and pwm (or "smart")

[relo999]

In bios they're all on "silent" mode and switching the power mode from Automatic to PWM also didn't change anything.

Edit:

Found the issue, newest BIOS seems to have a bug. The version before the latest works fine (3.16), still the case fans 1 and 2 seems to be treated differently as they spin later than the fan on header 3 and the CPU but that's a none issue.