Zitat von »neuer Benutzername« maybe try the the pump without the Ultitop Dual outside the pc and check the noise then. If it is possible... little loop only pump Problem is solved.. I removed the rotors on the pumps and put them back after cleaning the ceramic bearing https://www.youtube.com/watch?v=qIxa8jlbuwM

Zitat von »Peter von Frosta« Zitat von »m1has« pumps shouldn't make noises like that, i think... No, that doesn't sound good... The only strange thing is that it occurs with both pumps. Perhaps some kind of resonance? Does the "ultitop dual" vibrate when the noise occurs or is there contact with the housing somewhere (the left Pump)? Maybe there is still air in the cooling medium? Tiny Bubbles in the reservoir with (both) Pump Speed at 100%? I tried tilting the computer in different ways to get...

Zitat von »Peter von Frosta« Hi there, I have uploaded the Video to youtube: movie If the OP has something against it - please let me know... Thanks for youtube upload.. what do you think about it? pumps shouldn't make noises like that, i think...

Hi, I installed new pumps in my system today. It growls from the first start. What do you think about it? Link for video https://webshare.cz/#/file/ziF6qzccse/pumpen-mov Thanks.