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  #1  
Old 05-06-2019, 09:21 PM
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Default ML120 Pro rgb rev to max speed on boot

hey all

I've got 6 ML120 Pro RGB fans connected to rgb hub and from the hub to the commander pro. I've set them all to 4 pin in icue and are set to quiet mode. All fans rev up to max speed on startup. Also 3 of the fans don't start spinning until the windows splash screen. Could my commander pro be defective? Does anyone have a clue on why it does this? Any help is greatly appreciated

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  #2  
Old 05-06-2019, 10:56 PM
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Nope, the CoPro isn't defective. It is working as designed.

The built-in fan curves are based on the CPU Package temperature. This isn't available until the software starts (Corsair Service). Because of that, the fans run at full speed.

The solution is to use the thermistors that are included with the CoPro and create custom fan curves based on those temperatures. Those fan curves can be written to the device and don't require the software to run.
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Old 05-06-2019, 11:00 PM
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Thanks for the response. Was close to buying a new commander pro. How would I get my custom fan curve written to the device?
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Old 05-06-2019, 11:17 PM
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The first step is to install and place the thermistors.
Then you use iCUE (or Link but, really, iCUE) to create custom fan curves using those thermistors as the source.
Apply the custom fan curves.
Done.
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Old 05-06-2019, 11:36 PM
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Thanks for that step by step guide. Got any suggestions on where to place the thermistors? I’ve got a Corsair 570x case with a h150i pro mounted to the front
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Old 05-07-2019, 12:57 AM
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Perhaps about 3" above the GPU. You'll find that the GPU is the biggest heat source. You'll want to experiment with the curves as well. The rear exhaust can have a surprising impact on internal case temps.
And you have 4 of those thermistors. Put them in different locations. You might be surprised at some of the temperature differentials.
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Last edited by DevBiker; 05-07-2019 at 09:30 AM.
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Old 05-07-2019, 08:06 AM
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Many thanks for your help. Take care
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Old 05-07-2019, 12:48 PM
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Quick question. How would I get the thermistors to stick into place? Is electrical tape ok?
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Old 05-07-2019, 01:26 PM
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Yes, just don't cover the yellowish tape on the end.
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Old 05-15-2019, 06:17 PM
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I've done what you suggested and my fans still rev up on startup. Made a custom fan curve and set it to the thermistor sensor #2 above the gpu. Could it have something to do with my bios?
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Old 05-15-2019, 07:42 PM
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Did you apply the curve to the fan? For how long are they revving?

And no, it shouldn't have anything to do with your BIOS unless the fan is connected to the motherboard headers.
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Old 05-15-2019, 09:57 PM
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I seem to have figured it out. I unplugged the sata power and all the thermistors and reconnected everything back. Doesn't rev up on boot anymore
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