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Aio temperature and fan curve


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Hello all,

Can you help me with to questions please.

1. What maximum fluid temperature can be on h100i v2?

2. Can anyone tell me what is the best fun curve for this AIO cooler?


I am asking because I already have second time when my fan on radiator is start to be very noisy. I mean rattling. My fans were set for 83% what give around 2300rpm. Really strange max for this fun is 2400rpm.

Please help me with these questions.

Thank you in advance

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1) Corsair does not publish a specific maximum, although other manufacturers of both AIO and custom parts typically specify in the 50-60C range. Since coolant temperature also represents the effective minimum CPU temperature, you will be banging off the thermal throttle point constantly if your minimum CPU temp is in that zone. Thus the effective limitation is end CPU temp and not component tolerances. Clearly plastic and rubber do not melt at 60C those tolerances go well past boiling.


2) A custom curve of your design. Everyone has a different hardware and case environments. Ambient room and case temperature tends to be the most dominant factor. I think the easiest way to set this up is as follows:


  • Boot up your computer and let it sit idle on the desktop or doing light work for 10-15 minutes. This is your baseline coolant temperature. You should set a fan speed that is quiet and non-intrusive for that temperature. For most people that is probably between 800-1000 rpm on a 120mm fan, but it is your choice. At idle, an extra +2C is irrelevant.


  • Leave yourself some ambient temp wiggle room and start a slow climb about 3C further down the line. You don't want the fans to kick up because it is +1C warmer in your room today. You can expand this as needed. This also can be a bit tricky if you have one of those rooms that is cool 18C in the morning, but 27C in the afternoon. For that, you may need a "AM" and "PM" curve.


  • Boost the fan speed up to a tolerable level around the +6C mark. This is generally where most people top out for CPU max loads and general multipurpose loads. If you have a lot of GPU heat in a small case, you are likely to see higher numbers when under GPU load and should adjust accordingly. Regardless, find the maximum coolant temperature you normally see during real use and set the fans to the highest level you are willing to endure. Most people are probably in the 1300-1500 range for this.

  • Set a 2000 rpm blast about +5-7C further down from the highest temp you have seen. This serves as a warning system in case things are out of balance. You will most certainly hear the fans before you notice the coolant temp is abnormally high. You don't need to use 2000 rpm speeds for anything. It won't help.



You can only reduce CPU temperature by the amount you can reduce coolant temperature. Essentially, you can only reduce the CPU minimum or base temperature. That jump to 80C when you load all cores is the result of voltage and conductivity. Fan speed won't help with that and you must live with those results. You can keep your baseline low to consequently keep the peak values lower. Those three presets have a 20-23C baseline as reference, so it may work well in Winter or cool seasons, but definitely not in Summer for most temperate or Mediterranean climates.

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