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Question Can't control chassi fans - Only one fan works i think.

Apr 28, 2020
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Hey everyone,

PC components:
Cpu: i7-8700k
Gpu:asus geforce rtx 2070 super dual evo ad
motherboard: Mobo z370 i strix

I bought a used pc when i tried to raise and lower the fan speed (beacuse is was to loud) . With applications like SpeedFan and Argus Monitor. I could only raise one fan not the othe five but at the same time could only lower the fan i could raise it to 40% not to 0%

I have 6 fans in total, 3 in the front, 2 at the top and 1 at the back connectd to my cpu cooler crosair A60.

As you can see from the picture i can only raise one fan to 100% but at the same time only lower the same fan to 40% to 0%. And the other fans are stuck at 50%( picture)

Picture from Argus Monitor View: https://imgur.com/a/J5eSDtN


Pictures frm SpeedFan View: https://imgur.com/a/CcwSX28
as you can se i can only controll PWM5 beacuse i put it in manual but i can't control the rest.


Can anyone help me, this is my first PC never could afford one before, so iam not good at stuff like that. I have tried to look in the BIOS but it's like a maze for a noob like me.

If you guys need more pictures or something please let me know.

Thanks.
 
Last edited:

AppleGwava

Reputable
Jul 11, 2016
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Im not familliar with custom fan speeds, but here are some ideas

Have you confirmed all fans are plugged into Motherboard fan headers? Instead of just psu power

All the fans 4 pin connecters instead of 3 pin (Vaguely remember that 3 pin either cant be controlled or only voltage control

I would also advice attempting to control them in the bios first, to determine whether its a software or hardware issue

cheers
Alvis
 

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