How to stop pump buzzing?

PhantomHawk11 · July 3, 2018

I just finished building my first watercooling loop, and I originally ran my loop with distilled water with no issues. After I drained it and added mayhem's aurora I've had a buzzing noise coming from the pump. I have been running it for a couple hours, and I have turned it off and tilted it a bit with no change. Any solutions?

Picture of loop: https://imgur.com/a/FaTaoV1

Video of noise: https://streamable.com/41cvo

Skiiwee29 · July 3, 2018

Play with the RPMs of the pump. I know with my D5 the ideal spot for the least pump noise, at least for me ears is at about 65-80% RPM. This is the range that I also use for running my pump during idle and load.

Raxxath · July 3, 2018

Could be the vibrations of the pump resonating with the case. Can you try gripping the pump in your hand (to stop the vibrations from transferring to the case) and see if that quiets it?

PhantomHawk11 · July 3, 2018

13 hours ago, Skiiwee29 said:

Play with the RPMs of the pump. I know with my D5 the ideal spot for the least pump noise, at least for me ears is at about 65-80% RPM. This is the range that I also use for running my pump during idle and load.

I cant change the speed of it at all. It is a 3 pin fan connection, I've tried plugging it into different headers, if I change it in the PWM section nothing happens, if I chnage it in the DC section, it either goes on or off

PhantomHawk11 · July 3, 2018

6 hours ago, Raxxath said:

Could be the vibrations of the pump resonating with the case. Can you try gripping the pump in your hand (to stop the vibrations from transferring to the case) and see if that quiets it?

That's not it

SaintPosum · July 4, 2018

Sounds like it has to not so much with the speed as it does the resistance of the liquid. Distilled water has a different "weight" than the other fluid. Its likely causing the pump to chatter from the extra work. Could also be wearing the bearing out prematurely. Dont really have a solution but I hope this helps.