Switch on/off button on additional fans?

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bokrael

bokrael

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Aug 30, 2017
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Hello I got 2x12cm fans with 4 pins connector directly to the PSU. They are on my side panel how is perforated by default. Is there any chance to add a switch on/off button on them and turn them on only when Im playing?
 
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Ubrales

Ubrales

Polypheme
Dec 3, 2009
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Side panel intake fans are a great source of intake air to the computer case. Besides, they use very little power; about 10 wayys each. Do not add switches to turn them OFF. Since they are 4-pins fans, consider plugging them to motherboard fan headers and use the BIOS (or other programs) to speed control if required. Personally I would let them run at full speed.
 
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L

little_me

Splendid
May 9, 2015
1,670
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thus they likely use old 4 pin molex connector, out of which they use only 12 V line, in which case you could simply add on/off switch in that line to turn them on/off.

or.. buy one as ready made part
http://www.performance-pcs.com/4-pin-molex-power-adapter-cable-w-remote-on-off-toggle-switch-36-sleeved.html
http://www.ebay.com/itm/4-Pin-Molex-Extension-Sleeved-Cable-w-On-Off-Toggle-Power-Switch-36-inch-/400696513855
https://www.coolerguys.com/products/molex-4-pin-on-off-power-switch-12v-and-5v-dc
 
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bokrael

bokrael

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Aug 30, 2017
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Fan's life is what bothers me. Also PC overall energy consumption. It would be nice to switch them off when I don't need them to extend their life and save energy.

I think a software controller would be the the perfect option. But I thing I cannot connect these 4 pins somehow to my motherboard? Also I think I got only 1 exit for fan and its already used but rear exaust fan or I am mistaken?

https://www.gigabyte.com/Motherboard/GA-H61M-D2H-rev-10#sp
 
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Nigel Spike

Nigel Spike

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Jan 9, 2016
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They are running full speed because you have them connected to your PSU. To make them vary their speed due to different temps on your motherboard or CPU, you have to connect them, either to your motherboard, or to a fan hub connected to the motherboard. Read your motherboard manual for further information.

As for power consumption, they normally should draw about 0.5W each. Possibly printed on the label, or on the manufacturer's website.

Nigel
 
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bokrael

bokrael

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Aug 30, 2017
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I installed the fans. And strange thing here is that my temperatures are still the same? While playing I got 40-45 degree on CPU and 60-65 on GPU. How is this possible with 2 such a big fans blowing all the time at my components? Also how are these temperatures anyway?
 
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