Corsair H150i PRO Not sticking to custom curve

It's probably my choice of fans but I can't get iCue to agree with the set speed I want, it does its own thing.
I have 3 mining fans I had lying around with a max speed of 6k rpm. I bought this refurbished cooler and the fans weren't included.

Zero RPM keeps the fans at a steady 950rpm but only for a few minutes or an hour then it suddenly locks them at 2500rpm. It's pretty random and the temps stay around 35c so there's no need for them to ramp up like they do.
I tried to set a custom setting at a fixed RPM of 1200. It doesn't respond at all.

Aside from the obvious answer, getting more appropriate fans, what else should I do here?

Nice post

Noctua are really good fans. There is another company, which i reckon their fans are a even quieter. Top end may not be as much. 'XILENCE'
Their 120mm fans peak out at about 1500rpm, enough to push or pull. One thing thats vital with the brushless XILENCE fans is theyre kept completely vertical, otherwise the fan blade part, shifts the motor shaft inside the case, and then its off balance.
Pretty sure you could run the XILENCE fans at 100% too and wouldnt be able to hear them.

Just another option

Ghot said:

There's two ways to deal with fans.

1. Fan curve (PWM fans, 4-pin)
2. Fans ON 100% (3 or 4 pin fans)

Most AIO water cooler companies want you to use method #1.
You hook everything up like in the directions, then set a fan curve in the BIOS.
The temp. goes up, the fans speed up.


The other method is just run the fans at 100% all the time.
Unfortunately, this usually creates too much noise for the consumer.
In the 100% fan speed scenario, you need buy fans that are only as noisy as you can deal with.
All else being equal, the larger the fan, the more cfm it can push, at a lower speed, with less noise.


The quietest solution for an AIO water cooler is use quiet fans.
The Corsair H150i PRO uses 120mm fans. So if you don't want to deal with fan curves... you need to buy low dB fans, that still push a lot of air, and have decent static pressure.



Generally, Noctua makes the best fans with high cfm and low noise.

This is best 120mm fan they have...
Amazon.com

70cfm, 25dB, 2.83 static pressure.
You could run this on a fan curve or just at 100%

The fan curve is not a good option with motherboard nor iCue. iCUE isn't happy with the fans set any lower than 20% which is around 2500 rpm. The Motherboard software has an option for automatic stop/start but it makes my pc stutter hardcore.

But I guess it IS overkill having mining fans so I will take both your advice and look into Noctua and Xilence fans. Preferably something RGB.

Not anymore. I can't seem to find anything that can control them properly. I tried a fan controller hub but it couldn't keep a steady RPM, instead it ramped then up and down like a rollercoaster.

I think I might try and make a levitating DeLorean with them next 😂