chidy Posted May 7, 2019 Share Posted May 7, 2019 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 Ryzen 1600x Strix x370-F Corsair Vengeance RGB Pro 16gb 3200mhz Strix 1080 ti Evga 750 g3 960 evo 256gb WD black 6tb Link to comment Share on other sites More sharing options...
DevBiker Posted May 7, 2019 Share Posted May 7, 2019 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. Link to comment Share on other sites More sharing options...
chidy Posted May 7, 2019 Author Share Posted May 7, 2019 Thanks for the response. Was close to buying a new commander pro. How would I get my custom fan curve written to the device? Link to comment Share on other sites More sharing options...
DevBiker Posted May 7, 2019 Share Posted May 7, 2019 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. Link to comment Share on other sites More sharing options...
chidy Posted May 7, 2019 Author Share Posted May 7, 2019 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 Link to comment Share on other sites More sharing options...
DevBiker Posted May 7, 2019 Share Posted May 7, 2019 (edited) 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. Edited May 7, 2019 by DevBiker Link to comment Share on other sites More sharing options...
chidy Posted May 7, 2019 Author Share Posted May 7, 2019 Many thanks for your help. Take care Link to comment Share on other sites More sharing options...
chidy Posted May 7, 2019 Author Share Posted May 7, 2019 Quick question. How would I get the thermistors to stick into place? Is electrical tape ok? Link to comment Share on other sites More sharing options...
DevBiker Posted May 7, 2019 Share Posted May 7, 2019 Yes, just don't cover the yellowish tape on the end. Link to comment Share on other sites More sharing options...
chidy Posted May 15, 2019 Author Share Posted May 15, 2019 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? Link to comment Share on other sites More sharing options...
DevBiker Posted May 15, 2019 Share Posted May 15, 2019 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. Link to comment Share on other sites More sharing options...
chidy Posted May 16, 2019 Author Share Posted May 16, 2019 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 Link to comment Share on other sites More sharing options...
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