Case fans stuck at 100% after every reboot

  • Hi there and welcome to PC Help Forum (PCHF), a more effective way to get the Tech Support you need!
    We have Experts in all areas of Tech, including Malware Removal, Crash Fixing and BSOD's , Microsoft Windows, Computer DIY and PC Hardware, Networking, Gaming, Tablets and iPads, General and Specific Software Support and so much more.

    Why not Click Here To Sign Up and start enjoying great FREE Tech Support.

    This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  • Hello everyone We want to personally apologize to everyone for the downtime that we've experienced. We are working to get everything back up as quickly as possible. Due to the issues we've had, your password will need to be reset. Please click the button that says "Forgot Your Password" and change it. We are working to have things back to normal. Emails are fixed and should now send properly. Thank you all for your patience. Thanks, PCHF Management
Status
Not open for further replies.
Skogis

Skogis

PCHF Member
Mar 11, 2019
4
0
22
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?
 
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?
 
Bruce said:
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?
Click to expand...
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.
 
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.
 
Status
Not open for further replies.
Top Bottom