quiet and my last one sounded like a train

No odd sounds from it really

So I HIGHLY recommend you replace the stock fans on this before installing unless you like the sound of a rocketship blasting off as soon as u turn on ur PC

and I know it's the pump at this point, and the sound is absolutely excruciating

This means when it is performing under load, I get a nice ticking sound from the pump that is really loud and annoying.

but the sound is little noise

They work well but the sound is terrible

But just today I pushed the fan's 100 present and 1 of the fans is making a strange, ball barring sound.

A TERRIBLE BUZZING SOUND

No leaks no sound.

strange sounds are coming out and I'm afraid something bad will happen to my system

Purchase made in July 2017, by the end of November, 4 months hard, the best cooling system model 240mm quieter fans, but with less rebolutions, wow less noise, with wider radiator, I waited after your warranty of 5 years will be damaged , but that 4 months hard, is more than half a year, the pump started to make a click sound faster and stronger, until it turned off the mobo, because the temperature rose to over 50C, and so it happened for 3 weeks sometimes the sound was not

One of them worked well, and the other one made an awful noisy sound when rotating that quickly became too much to deal with, I ordered replacement fans within 2 days of acquiring this

its a "fan blade hitting something" king of noise.this noise is most noticeable at lower RPM.. when i set the system for full load i can hear the fans perk up and get faster and faster and the noise gets a little wonky like its almost wobbling around in there then all the sudden its gone.. and the sound is smooth as butter

This product is great for most CPU,s