"I get a CPU fan error using my Noctua PWM fan, is it faulty?
Noctua PWM fans feature a minimum speed of 300rpm to allow for ultra quiet operation when your CPU is at idle state and doesn’t require higher cooling performance." http://www.noctua.at/main.php?show=faqs&step=2&products...
You can disable or lower in BIOS the minimum CPU fan speed for warnings.
Yeah I see now,
I had to disable them in the UEFI under 'monitor' in order to boot after BIOS update.
They run low (under 300rpm) but then at full they are at 1000+rpm which i can now control.