Jump to content
Search In
  • More options...
Find results that contain...
Find results in...
sysid

SpeedFan turns off my cpu fan

7 minutes ago, sysid said:

I installed SpeedFan to set a custom curve for my case fans and everything works fine, however when i use the same settings for my cpu fan it just turns off.
The settings i used for my case fans are:
"Advanced" tab->Pwm 1(which controls all them since they're PST) mode: "Manual" and then set a custom curve in the "Fan Control" tab.
For my CPU fan: Advanced -> Pwm 2(i confirmed this is my cpu fan since other settings work) mode: "Manual", then set a custom curve like the other one.


I can see on the "Readings" tab that it's actually detecting the fan control since the speed % changes with my temps, but it still says 0 RPM and my fan turns off. The only settings that work with it are "Speed Cruise" and "Smart IV" but it seems neither of them are that good.

There's a lower limit for fans to run at, and they aren't all the same. If you raise the lowest level of the CPU fan, will it stay on?

Recommended Posts

Posted · Original PosterOP

I installed SpeedFan to set a custom curve for my case fans and everything works fine, however when i use the same settings for my cpu fan it just turns off.
The settings i used for my case fans are:
"Advanced" tab->Pwm 1(which controls all them since they're PST) mode: "Manual" and then set a custom curve in the "Fan Control" tab.
For my CPU fan: Advanced -> Pwm 2(i confirmed this is my cpu fan since other settings work) mode: "Manual", then set a custom curve like the other one.


I can see on the "Readings" tab that it's actually detecting the fan control since the speed % changes with my temps, but it still says 0 RPM and my fan turns off. The only settings that work with it are "Speed Cruise" and "Smart IV" but it seems neither of them are that good.

Link to post
Share on other sites

i've actually never seen anyone control fan speed with speedfan before it's usually reserved for just glancing at temp probes. Use the bios to control the cpu fan speed or let the board do it by itself as any rpm was better than 0 rpm

Link to post
Share on other sites
Posted · Best Answer
7 minutes ago, sysid said:

I installed SpeedFan to set a custom curve for my case fans and everything works fine, however when i use the same settings for my cpu fan it just turns off.
The settings i used for my case fans are:
"Advanced" tab->Pwm 1(which controls all them since they're PST) mode: "Manual" and then set a custom curve in the "Fan Control" tab.
For my CPU fan: Advanced -> Pwm 2(i confirmed this is my cpu fan since other settings work) mode: "Manual", then set a custom curve like the other one.


I can see on the "Readings" tab that it's actually detecting the fan control since the speed % changes with my temps, but it still says 0 RPM and my fan turns off. The only settings that work with it are "Speed Cruise" and "Smart IV" but it seems neither of them are that good.

There's a lower limit for fans to run at, and they aren't all the same. If you raise the lowest level of the CPU fan, will it stay on?


Main: AMD Ryzen 7 1700X, Nvidia GTX 780, 16 GB 2667 MT/s DDR4

Secondary: Intel Xeon X5670, Nvidia GTX 660, 24 GB 1333 MT/s DDR3

Server: Intel Xeon X5670, 60 GB 1333 MT/s DDR3-R

Laptop: Intel Core i5-3320M, 16 GB 1600 MT/s DDR3

Link to post
Share on other sites
1 hour ago, emosun said:

i've actually never seen anyone control fan speed with speedfan before it's usually reserved for just glancing at temp probes. Use the bios to control the cpu fan speed or let the board do it by itself as any rpm was better than 0 rpm

It can do it.  It was designed before fan speed could be easily ramp controlled though so it’s tools and systems are old.  There was a time it was invaluable. Iirc the old intel board for my Qswries chip wouldn’t do fan ramps in bios so I used speedfan.


Life is like a bowl of chocolates: there are all these little crinkly paper cups everywhere.

Link to post
Share on other sites
2 minutes ago, Bombastinator said:

It can do it.  It was designed before fan speed could be easily ramp controlled though so it’s tools and systems are old.

well thats how old computers are sometimes

Link to post
Share on other sites
Posted · Original PosterOP
1 hour ago, svmlegacy said:

There's a lower limit for fans to run at, and they aren't all the same. If you raise the lowest level of the CPU fan, will it stay on?

That did the trick, thanks!

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×