Corsair H75 Making Noise

[Supreme PC]

My Corsair H75 AIO water cooler makes really loud clicking noises when the computer has been left on for a while, although using monitor software it doesnt appear to be going down in performance or anything like that. Is this normal? Does anyone know what it is?

 

[King Kevain]

What did you plug the pump into? The Pump has to run at 100% all the time - if you plugged it into the CPU header it will be throttled to about 600rpm when idle - should be at 1500RPM all the time.

Ensure the Pump Header is plugged into a CHA FAN header and that it is set to 100% in BIOS so any PWM Fan Management Software cannot override it, the Fans on the Radiator should be plugged into the CPU Header.

 

[Supreme PC]

damn i'll do that then...I think I had it set up like that before I bought my new case and motherboard and it didnt make any funny noises like that. I'll give it a go and see how it turns out, thanks for the reply.

 

[King Kevain]

All good mate, you'd be surprised how many people install AIO Liquid coolers incorrectly and then they complain about how noisy or poorly they perform
Hopefully you haven't done any permanent damage to the pump and that rattle goes away once you juice it up again.

The other common error is, not all AIO Liquid Coolers are designed with PWM fans and the Pump and the Fans are both supposed to run 100% (especially the older ones), yet people still connect them to PWM Headers or let Software alter their speed and so they do not run as fast as they should to get the results as advertised/tested/reviewed.

I'm running my H75 on an i7-4790K with a small OC to 4.6Mhz (turbo) - Pump on the CHA_FAN Header runs at 100% set manually in BIOS, I use Fan Expert 3 to manage all the PWM fans as well. system Idles at about 33degC with a room Ambient of about 25degC, gets up to about 54-57degC at load, 70-75degC on a stress test (which is why I keep my OC so small).

Just watch out though if you do use Fan Expert - it sets profiles for all the Fans in the case from Silent, Standard, Turbo and Extreme - on silent, it will shutdown the CPU Header if temp is below a certain level, same with the CHA_FAN headers - which means it'll turn off the pump and Radiator Fans if your not careful.

 

[Steppy 20]

All good mate, you'd be surprised how many people install AIO Liquid coolers incorrectly and then they complain about how noisy or poorly they perform
Hopefully you haven't done any permanent damage to the pump and that rattle goes away once you juice it up again.

The other common error is, not all AIO Liquid Coolers are designed with PWM fans and the Pump and the Fans are both supposed to run 100% (especially the older ones), yet people still connect them to PWM Headers or let Software alter their speed and so they do not run as fast as they should to get the results as advertised/tested/reviewed.

I'm running my H75 on an i7-4790K with a small OC to 4.6Mhz (turbo) - Pump on the CHA_FAN Header runs at 100% set manually in BIOS, I use Fan Expert 3 to manage all the PWM fans as well. system Idles at about 33degC with a room Ambient of about 25degC, gets up to about 54-57degC at load, 70-75degC on a stress test (which is why I keep my OC so small).

Just watch out though if you do use Fan Expert - it sets profiles for all the Fans in the case from Silent, Standard, Turbo and Extreme - on silent, it will shutdown the CPU Header if temp is below a certain level, same with the CHA_FAN headers - which means it'll turn off the pump and Radiator Fans if your not careful.

I'm just wondering how you can install this one incorrectly and what you mean by 'once you juice it up again'

 

[King Kevain]

All good mate, you'd be surprised how many people install AIO Liquid coolers incorrectly and then they complain about how noisy or poorly they perform
Hopefully you haven't done any permanent damage to the pump and that rattle goes away once you juice it up again.

The other common error is, not all AIO Liquid Coolers are designed with PWM fans and the Pump and the Fans are both supposed to run 100% (especially the older ones), yet people still connect them to PWM Headers or let Software alter their speed and so they do not run as fast as they should to get the results as advertised/tested/reviewed.

I'm running my H75 on an i7-4790K with a small OC to 4.6Mhz (turbo) - Pump on the CHA_FAN Header runs at 100% set manually in BIOS, I use Fan Expert 3 to manage all the PWM fans as well. system Idles at about 33degC with a room Ambient of about 25degC, gets up to about 54-57degC at load, 70-75degC on a stress test (which is why I keep my OC so small).

Just watch out though if you do use Fan Expert - it sets profiles for all the Fans in the case from Silent, Standard, Turbo and Extreme - on silent, it will shutdown the CPU Header if temp is below a certain level, same with the CHA_FAN headers - which means it'll turn off the pump and Radiator Fans if your not careful.

I'm just wondering how you can install this one incorrectly and what you mean by 'once you juice it up again'

The physical install is pretty straight forward, its the setting of the pump you have be careful of.

Mobo's usually expect a Fan to be attached to the CPU header, not a pump - by default, the CPU Fan header is PWM on most new Mobo's. PWM is no suitable for pumps on AIO Cooling systems - the header needs to be manually set to operate at 100%.

The simplest solution - connect the pump to a molex, connect the AIO fans to the CPU Header

The normal solution, connect the pump to the CPU header, the fans to the CPU ALT header - in BIOS, set the CPU fan profile to 100%, set the CPU ALT header to PWM to control the radiator fans.

so as per the OP once you set the fan header for the pump to run at 100% hopefully the noise will go away. If you have ran it at low or variable speeds for a long time, you may have damaged pump, in which case you will need to replace it. The pump in the cooler is designed to pump the liquid that is in the loop efficiently under normal operation, if say the pump was only running at 50% power, it would struggle to push the liquid around, thus stress the pump, and stress will cause damage to the pump motor, and you get a rattle/noisy pump.

I have yet to see one review that covers this step in the installation - and none of the Corsair installation guides cover it either - but they post it in their help forums, go figure.