Controlling CPU Fan Speed

[ken1212]

I have a gigabyte uefi dualbios with an i7-3820 processor. The CPU has a FA-WATER-601 COOLERMASTER SEIDON 120M WATER COOLER I use my system for video editing and when I am rendering or exporting the CPU gets Hot at 100C. On teh other hand when it's in normal use such as surffing the web it's usualy in the 50's and 60's C. . I noticed the CPU Fan in the back of the case that cools the radiator spins slow all the time. I went into the bios and changed CPU fan from Normal to manual and increased speed from 0.75 to 2.25 and rebooted but the speed is still the same. What else Am I supposed to do to control the CPU fan speed? Thanks

 

[t53186]

Where is that fan plugged in? and yes the fan speed should increase. Kind of hard to see in the manual but it looks like both the pump and fan need to be plugged into 4-pin connectors for the PWM function to work.

Manual is here: http://www.coolermaster.com/cooling/cpu-liquid-cooler/seidon-120m/

 

[ken1212]

Where is that fan plugged in? and yes the fan speed should increase. Kind of hard to see in the manual but it looks like both the pump and fan need to be plugged into 4-pin connectors for the PWM function to work.

Manual is here: http://www.coolermaster.com/cooling/cpu-liquid-cooler/seidon-120m/

It's plugged into the CPU Fan header right under the CPU. I have a Coolermaster CM Storm case and it has built in controller for the case fans and I can control case fan's speed fine. But not the CPU.

 

[t53186]

Well without looking at the manual for that board it sounds like the correct location to plug in the fan. Try cranking up that speed in bios to the point where you actually notice a difference.

Where is that fan plugged in? and yes the fan speed should increase. Kind of hard to see in the manual but it looks like both the pump and fan need to be plugged into 4-pin connectors for the PWM function to work.

Manual is here: http://www.coolermaster.com/cooling/cpu-liquid-cooler/seidon-120m/

It's plugged into the CPU Fan header right under the CPU.

 

[ken1212]

Where is that fan plugged in? and yes the fan speed should increase. Kind of hard to see in the manual but it looks like both the pump and fan need to be plugged into 4-pin connectors for the PWM function to work.

Manual is here: http://www.coolermaster.com/cooling/cpu-liquid-cooler/seidon-120m/

So I just opened the case and looked inside it and the power for the radiator pump is plugged into the CPU Fan Header while the Fan itself is plugged into the system fan. Should I swap them? Also the CPU fan in the Bios was set to Normal at 0.75 should I switch it back or keep it on Manual with the 2.25 I increased it to?

 

[t53186]

Yes, swap them out. and change bios for the cpu fan to something other than a fixed number, like auto, normal, performance, etc. Do you happen to know the motherboard model #

 

[ken1212]

Yes, swap them out. and change bios for the cpu fan to something other than a fixed number, like auto, normal, performance, etc. Do you happen to know the motherboard model #

Got it Thanks. Out of curiosity the System fan header was set to normal which means the fan speed would change based on need, how come the fan speed is always the same, on slow even the temperatures rising?

 

[t53186]

That's why I asked about the model #, was going to grab the manual and look it up

 

[ken1212]

That's why I asked about the model #, was going to grab the manual and look it up

The Fan is a LEPA LPF12FNB

 

[t53186]

Sorry to add to the confusion. I wanted to get the motherboard model# and the manual and see what other information we can find.

 

[ken1212]

Sorry to add to the confusion. I wanted to get the motherboard model# and the manual and see what other information we can find.

No problem, it's GA-X79S-UP5-WIFI. Below is the link to the manufacturer. Just to let you know I switched the fan to the CPU Fan Header and everything is set to normal in the bios. I did a video render to warm up the cpu which got to mid 80's but the CPU Fan is still running slow.
http://www.gigabyte.com/Motherboard/GA-X79S-UP5-WIFI-rev-10#ov

 

[t53186]

Thanks for the link. Looks like a bunch of things you can change for the CPU fan. Control Mode, Speed control and slope. Control mode is if you have a four wire (PWM) fan, and might not work even if you do based on disclaimer about intel specification for pwm. Looks like you need to find the combination of these settings to make it work as expected. I would try auto, normal then auto silent, then auto disabled and see what happens

 

[ken1212]

Thanks for the link. Looks like a bunch of things you can change for the CPU fan. Control Mode, Speed control and slope. Control mode is if you have a four wire (PWM) fan, and might not work even if you do based on disclaimer about intel specification for pwm. Looks like you need to find the combination of these settings to make it work as expected. I would try auto, normal then auto silent, then auto disabled and see what happens

Right now I have it on auto normal and it seems to be running at slow speeds constantly. I read somewhere that the 17-3820 can operate up to 130C, is this correct, and when it get's close to 100C when rendering video is this okay. RealTemp shows hot when it gets into the 90's.

 

[Guest]

Ah.. The '90s. Mhm i feel ya bruh. But changing the cpu fan speed ain't HALF the proublem. It's time ya learned 'bout "airflow":http://www.tomshardware.com/faq/id-1858957/airflow-101-setting-fans-keeping-computer-cool.html
(Not my own work)