Case fans stuck at 100% after every reboot

[Skogis]

Hi!

I newly built my first PC, and everything is running as it should, except for the case fans.

The problem i that every time i reboot the computer the case fans gets stuck on high speeds and wont slow down no matter hon long i leave it to idle. However, if i put the computer in to standby mode and the start it agian, the fans work as they should.

System specs:
Gigabyte z370 hd3 (rev 1.0)
i3 8100
8gb corsair vengeance ddr4 2666mhz
The case fans i use are 3 pin fans from phanteks (included in p400s). They’re hooked up to the mobo and controlled by smart fan 5 in m.i.t
I have set them to voltage control, and they both have system 1 as temperature input.

Does anyone have any idea of why they are acting in this way?

[veeg]

Hello

Have you checked in your bio’s,to see what the fans are set at?

@Bruce @Rustys

[Skogis]

Hello

Have you checked in your bio’s,to see what the fans are set at?

@Bruce @Rustys

As i wrote they are controlled by smart fan 5, use the system 1 temperature input and because they are 3 pin fans they are set to voltage control.

[Bruce]

so they are 3pin fans connected to 4pin headers?
any chance they are not on the correct 3pins? (unlikely - just throwing it out there)

is the BIOS the latest version?

have you tried changing the fan system in MIT to silent or manual?

[Skogis]

so they are 3pin fans connected to 4pin headers?
any chance they are not on the correct 3pins? (unlikely - just throwing it out there)

is the BIOS the latest version?

have you tried changing the fan system in MIT to silent or manual?

They are connected to the 3 pins that they need to be. The BIOS is perhaps not the latest version, but should i take the risk and update it?

One of the fans i put to silent and the other one to normal. The problem is that after a reboot they dont seem to be controlled by smart fan 5 at all since they all spin at max speed.

[Bruce]

I’ve updated the BIOS firmware over my time maybe around the 50 times mark, and not once has it ever gone pear-shaped.
you just need to make sure you are getting the right update for you mobo make/model, don’t try the beta versions and make sure you don’t lose power during the process.
and if offered, make a BIOS backup.

[Skogis]

Okay, thanks. Have you solved similar problems while updating you bios?

[Bruce]

similar - no.
most firmware updates were to recognise new hardware on old mobo’s.

[veeg]

Any updates?

[veeg]

Any updates? After 48 hrs this thread will be closed.