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Fans increasing RPM beyond fan curve settings


Gar1234
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Hi,

 

I have a Corsair Obsidian case with four fans plugged into the commander pro.

I had this system for almost two years now and it has always been very quiet, even in demanding games.

 

A couple months ago, I noticed that my fans were getting much louder in games and sometimes even while the machine was idle.

I went in and cleaned the dust out of the machine, cleaned the fans off -- it made no difference.

I'll be playing a game and the fans start racing for 5-10 seconds, then they slow down. Their RPM reaches nearly double that which I'm setting for them in the fan curve. I have max RPM set to 1000 and they're going up to almost 2000 RPM at times.

 

In ICUE, I have the fans set to respond to the CPU temperature -- and the CPU is well within operating limits. It very seldom heats up beyond 50 °C. So, I have no idea why the fans are periodically doubling the RPM limit I have set for them in the fan curve, especially when there is nothing in the system that is overheating.

 

Everything is up to date, everything is operating well within temperature limits. Anyone know why this happening? Why are the fans ignoring the ICUE fan curve limit?

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In ICUE, I have the fans set to respond to the CPU temperature -- and the CPU is well within operating limits. It very seldom heats up beyond 50 °C. So, I have no idea why the fans are periodically doubling the RPM limit I have set for them in the fan curve, especially when there is nothing in the system that is overheating.

 

Your specs are not listed, but if you have a CPU made in the last 5-6 years you hit 50C every time you open a window, folder, or anything else. CPU temperature is extremely dynamic and changes faster than most monitoring programs poll. It also makes a terrible case fan control variable with no relationship between CPU temp and case fan speed. You would be better off using motherboard temp or better still the temperature probes for the Commander to measure something like rear exhaust temp. However, the quick fix is to set up a curve based on GPU temp. That is a known set of values for most people and the largest internal source of heat.

 

I am not sure about your recent change in circumstances. For most users, the constant fan shifting is the very first thing they notice when connecting a Commander Pro. The three presets are based on CPU temp as it is the only guaranteed data source in every CPU system. However as noted above, most users will want to get off those three presets immediately for the same reasons it is bothering you now.

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