How do you change fan speeds?

Wayfall · May 9, 2016

Hi

I'm getting a new case soon with new fans and they are 4 pins and i have 3 four pin headers on my board.

How to i control my fans so they don't go 100% when i turn them on?

My motherboard:
https://www.scan.co.uk/products/asrock-z97-anniversary-intel-z97-s-1150-ddr3-ddr3l-pcie-30-(x16)-sata3-6gbps-intel-gbe-usb-30-hdmi-a

Cheers

Ryan_78 · May 9, 2016

you download speedfan : http://www.almico.com/speedfan.php
then you set the fans be controlled. you can also set them in motherboard bios. generally you can set a fan curve in either for them to spin faster when temps are higher

Wayfall · May 10, 2016

What would you recommend is the best temp for the inside of a case for example '19-30C'

Could you link me an instructive video about how to set fan speed in BIOS and with Speed Fan.

Thanks

Ryan_78 · May 10, 2016

https://linustechtips.com/main/topic/154956-how-to-properly-set-up-speedfan/
Very useful link.
So I would reccomemd that you keep your components cool. GPU under 90C and CPU under 70C, mostly 69C is better. You can't really consider case temp. Just watch component temp.

Wayfall · May 10, 2016

Okay its just I'm trying cool my bedroom temp down a bit as the computer can heat up my room a few degrees after two hours of demanding games.

My CPU is between 50-60C currently in the heat wave while in winter-spring it was 40-50C and my GPU was 55-60C in the winter-spring and now with the heat wave goes to 60-65C.

Wayfall · May 10, 2016

Ryan_78 :

Isn't speed fan only for PWM fans thou? As they can be controlled and monitored

Ryan_78 · May 10, 2016

any 4 pin should work. the fourth pin is the fan speed control function

Wayfall · May 11, 2016

Can 3pin fans not be controlled?

Ryan_78 · May 11, 2016

3 pin fans can be controlled by voltage adapters or fan controllers. They will limit the voltage put into the fan and therefore change the fan speeds. The 4 pin one is able to be controlled by software rather than hardware

Wayfall · May 11, 2016

So what your saying is that I can go into the BIOS and change the voltage to the header if I would like to change the speed.

By back 120m is 3 pin and plugged into the CPU_FAN2 header which is just next to the white 4pin CPU_FAN1 header. The rear fan is decently quiet but I don't ever hear it change speeds so I'm guessing that's the speed my new fans would be going.

Ryan_78 · May 11, 2016

No you cannot change 3 pin fans with software. But yes you are right. Changing the input voltage changes the speed of the fan. Some bios are limited and cannot effectively change speeds. That's why you use speedfan. If you do not change the fan speeds, yes it will be at full speed. 3 pins and unmonitored fans including molex fans are going to run at full speed. It doesn't change speeds because it can't. 3 pin fans need a special adapter or fan controller hub to change speeds.

Wayfall · May 12, 2016

Can you suggest a really good fan controlling hub please as i can not control my fans within bios, speed fan or asrock own software.

Really need a quick answer as these fans are so loud and i can't get them to shut up as they are 100%ing.

Also with a fan hub can i plug them directly into the hub with no extra wires.

Will this work with 3 pin fans:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811992012&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-Skimlinks-_-na-_-na-_-na&AID=12087162&PID=3899435&SID=skim1402X558040Xc8177f245a4e504a8a4b1578a93be2b5&utm_medium=affiliates&utm_source=afc-Skimlinks

Ryan_78 · May 12, 2016

The companies NZXT and lampton make the best ones. The NZXT sentry 2 and 3 are the best. One is touchscreen and their other one is mesh

Wayfall · May 12, 2016

I just purchased this about an hour ago:
https://www.scan.co.uk/products/nzxt-sentry-3-54-touch-screen-fan-controller-matt-black

Going to be arriving tomorrow.

Would you say 40% (its lowest fan settings) as quiet. What is 40% fan speed in rpm?.

When I looked on speed fan I think they were running at about 1600rpm.

Ryan_78 · May 12, 2016

whatever 40% of the rated fan speed for the fans you have

Wayfall · May 13, 2016

Their Corsair SP fans. I have 1x120mm and 3x140mm in my case.

The Corsair SP140mm fan speed is 1440rpm so to find 40% I did:
1440/100=14.4
14.4x40=576

So 40% fan speed should be 576rpm right?

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