Cheapest way to control fans from water temp ?

Randall8686

Randall8686

Randall8686

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I am now really looking for total silence and would like to control my fan speeds from the water temp in my system. How would i go about this ? basically i want somthing like

Water temp

<35c = fan off
<40c = 30-40% fan speed
<50c = 60% fan speed
>50c = 100% fan speed.

Or something along those lines being able to adjust this either hardware or software is fine. Im looking to control 6 X 120mm fans. but am happy to use Y leads etc. Whats the best way i can do this ? I currently have a temp sensor in my water but its just displaying on a little LCD.
 
I use speed fan and my gpu and CPU temps. If either of them starts getting warm my fans start ramping up.
 
Theyre jumping up and down quite a bit under load though Disco, i tried using this method for a while and it annoyed me so i went back to manual speeds. If you do find some cheap way of doing it let us know, i could do with a similar thing.

I have 3 rads, and each rads fans goes to a seperate channel on my fan controller. I was thinking of just attaching a cheap 2 quid 12v Temp controlled switch to each channel and set one rad to come on at say 25 degrees, the next rad comes on at 30, then the last rad comes on at 35. Im guessing i would have to seperate each circuit on the fan controller before its reduced the voltage or the switch might not work properly.

Was only a thought, not sure i can actually be bothered since im running all my fans at tickover anyway, theres always room for improvement i guess.
 
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Why have the fans coming in at different temps no wonder the fans are ramping up and down.

Put all the fans in sync so your getting rid of the heat far better as all the rads will be working together to dissapate the heat.

Has your mobo not got software for controling fans so you can set up a fan profile so the fans work together.
 
BluD said:
Theyre jumping up and down quite a bit under load though Disco, i tried using this method for a while and it annoyed me so i went back to manual speeds. If you do find some cheap way of doing it let us know, i could do with a similar thing.
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I find that GPU temps don't jump around at all to be honest. They very steadily climb and then plateau.

Tbh I don't really need to have a CPU fan curve as the water temps barely rise when I push the CPU hard.

You can also experiment with hysteresis.
 
stuie said:
The recon
https://www.overclockers.co.uk/showproduct.php?prodid=CA-072-BX&groupid=701&catid=2331&subcat=189

will do the same as the aquacomputer unit but cheaper. Just make sure you use phoebetria instead of the bundled software

http://sourceforge.net/projects/phoebetria/
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this is a little more like the price i had in mind, However i dont have any front bays on my case. I guess once its setup i can just leave it inside the case. doing fan speeds of CPU temp is not really ideal as CPU temp has no reflection on water temp and ultimately its the water temp that matters. When rending a little snipped of video for say 5 mins my cpu will straight away jump to 80c but the water is only at 30c after 5 mins the water will creep up to 40c but there is no need for the fans to spin up and create noise
 
OLDPHART said:
Why have the fans coming in at different temps no wonder the fans are ramping up and down.

Put all the fans in sync so your getting rid of the heat far better as all the rads will be working together to dissapate the heat.

Has your mobo not got software for controling fans so you can set up a fan profile so the fans work together.
Click to expand...

Unfortunately since my fans are already on tick over the only way to make the PC quieter is to turn some off completely which is why I thought the temp switches would be a good idea. Maybe there's some software that allows you to turn off a fan completely but I haven't seen any.
 
BluD said:
Unfortunately since my fans are already on tick over the only way to make the PC quieter is to turn some off completely which is why I thought the temp switches would be a good idea. Maybe there's some software that allows you to turn off a fan completely but I haven't seen any.
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Normally you can set the fan profile low enough that the fan just stops spinning
 
Yeah I figured that wouldn't be good for the fans to have voltage fed to them whiles not quite enough to spin. I don't have much technical knowledge when it comes to electronics though :)

If it doesn't harm the fans that would be a good idea though.
 
BluD said:
Yeah I figured that wouldn't be good for the fans to have voltage fed to them whiles not quite enough to spin. I don't have much technical knowledge when it comes to electronics though :)

If it doesn't harm the fans that would be a good idea though.
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I have always done this and never had any ill effect. most fans are all brushless motors so its not going to do them any harm in practice. some people may argue the fact it will deteriorate the magnets over time however your talking years and years for that to happen. i have never had a fan fail from doing this the only way a fan has ever failed on me is the bearing fail
 
BluD said:
Unfortunately since my fans are already on tick over the only way to make the PC quieter is to turn some off completely which is why I thought the temp switches would be a good idea. Maybe there's some software that allows you to turn off a fan completely but I haven't seen any.
Click to expand...

I use Asus suite 3, if l put it on Silent mode it stops the case fans and my PWM pump idles at about 826rpm.

Even on Turbo mode its quiet, fans are quiet about 500rpm, PWM pump idles at roughly 826rpm up to1600rpm and l can just hear it.

Have you looked at the utility software that came with your mobo.

What rpm are your fans idling at and what fans are you using?
 
Im using a mixture of fans, the most recent ones i bought are akasa piranhas. My old fans ticked over at about 500 rpm i havent checked the piranhas tbh, theyre very quiet but i figured why have fans running for the sake of it if theyre not doing anything, might as well have a completely silent PC when browsing. I turned my fans off at the fan controller while i was browsing earlier and the loop temp stayed within 1 degree, so i guess it can work passively while theres not much going on.

If your asus software can stop the fans, maybe the gigabyte ones can also. On your asus software can you tell it to adjust the fan speed according to any sensors or just the CPU/Mobo ones? The only things that really heat up my loop are the GPUs so i would have to set the fans to turn on when the GPU temp goes up, rather that using the water temp. I could maybe tell it to turn on the 2 fans on the 240 rad when im just getting CPU load, then turn on the other 2 360 rads when im getting GPU load.
 
Randall8686 said:
this is a little more like the price i had in mind, However i dont have any front bays on my case. I guess once its setup i can just leave it inside the case. doing fan speeds of CPU temp is not really ideal as CPU temp has no reflection on water temp and ultimately its the water temp that matters. When rending a little snipped of video for say 5 mins my cpu will straight away jump to 80c but the water is only at 30c after 5 mins the water will creep up to 40c but there is no need for the fans to spin up and create noise
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Its fidly to do but you can remove the board from the mount and display allowing it to be mounted anywhere. Cant say what if anything that would do for the warranty though
 
OLDPHART said:
I use Asus suite 3, if l put it on Silent mode it stops the case fans and my PWM pump idles at about 826rpm.

Even on Turbo mode its quiet, fans are quiet about 500rpm, PWM pump idles at roughly 826rpm up to1600rpm and l can just hear it.

Have you looked at the utility software that came with your mobo.

What rpm are your fans idling at and what fans are you using?
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I have not looked at my Mobo tbh maybe i should. I have too many fans and not enough headers i guess i couple put a couple on each header. But that still does not use my water temp

Im using corsair SP120 quiet's (they are pretty Cr@p so will be changing to Vardars soon
 
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