Undervolting waterpump

[goaway]

Just wondering if it is a bad idea to undervolt a 3-pin waterpump?   Was thinking of going down to 9V to keep things a little more quiet.  Cooler in question is the fractal design kelvin s36.  

[tekgeek1205]

yes you can lower the voltage, its a voltage control pump

 

http://www.fractal-design.com/home/product/water-cooling/s36

Edited April 23, 2016 by tekgeek1205

[tekgeek1205]

also it a .27amp pump, you can just hook that up to your cpu fan header and set up fan profiles in the BIOS

[Naeaes]

I guess you can, but rather you should use PWM to slow it down. If you undervolt it, you lose both speed and torque in addition to the ability to dynamically counteract the changes in viscosity (there's a slight deviation for water temperature, the bigger issue is gunk buildup), but if you use PWM, you only slow it down without really affecting the torque and it'll automatically push harder if need be to maintain the speed. PWM adjust ment should be available though the 'fan curves' in the CPU_fan1 header.

Edit: strike that. The pump doesn't support PWM.  You're stuck with undervolting it.

[tekgeek1205]

its not a PWM pump it a Voltage control pump. they clearly state it in the link i posted above. its at the bottom of the page.

[tekgeek1205]

@Naeaes

I do agree that any time PWM is available its the best to use. You can run at a lower RPM and things last longer.