Case fan speed not changing

mdaw · 26 Dec 2020 at 14:25

Hi all,

When putting my new components into my case I changed my case fans from phanteks https://www.overclockers.co.uk/phanteks-ph-f140sp-140mm-fan-black-white-fg-007-pt.html to the arctic p14 pwm which should go from 200-1700rpm but seem to stay consistently at near enough 1100rpm despite going into the BIOS and making sure pwm is on. Motherboard us the MSI x570 tomahawk.

Mesai · 26 Dec 2020 at 14:33

The part where you see the PWM checkbox, also check "Smart fan mode" just to the right of it to enable the curve.

mdaw · 26 Dec 2020 at 14:38

Ok, cheers for that. I will take a look next time I get a chance.

mdaw · 26 Dec 2020 at 14:41

If I remember correctly i think I have daisy chained the two intake and ok one exhaust fan together. That should just mean all 3 will spin at the same speed depending on what the temps are right?

Mesai · 26 Dec 2020 at 15:11

mdaw said:
If I remember correctly i think I have daisy chained the two intake and ok one exhaust fan together. That should just mean all 3 will spin at the same speed depending on what the temps are right?

Yea, whatever you set that header to follow, all fans linked to it will track the same speed. I have my 3 intake fans on a single header and set to follow the CPU temp.

mdaw · 20 Jan 2021 at 13:01

I know I posted this a while ago but I've not really had any time to use the computer so I've only just got round to trying it. Thanks for the answers. I realised that the CPU fan was set on smart mode but the case fans were not. Thanks for sorting this for me. All seems to be working nicely.