Manujito Posted November 25, 2018 Share Posted November 25, 2018 Hi, I've had this "issue" since forever, but it has never bugged me that much so I never bothered to ask if this is normal behaviour or not. I have a Commander Pro, and every time I start my PC up, every fan spins at 100% for a few seconds, my guess is until post is complete. Then they turn quiet and everything works normally. My question is: is this normal behaviour or should every fan stay quiet even at startup? Thanks! Link to comment Share on other sites More sharing options...
c-attack Posted November 25, 2018 Share Posted November 25, 2018 What kind of fans? DC motors? The most likely reason is your control source. If you have them set for a motherboard supplied value (like GPU temp), it can’t read that without the software running. I use the temp probes as a control source and those can be read at all times and thus the fans always follow orders. Link to comment Share on other sites More sharing options...
Manujito Posted November 25, 2018 Author Share Posted November 25, 2018 I actually use a temp probe as well. The fans are all Corsair ML Pro series, and I think those are DC. Link to comment Share on other sites More sharing options...
c-attack Posted November 25, 2018 Share Posted November 25, 2018 The ML are PWM, don’t require a voltage blast to start, and mine even sit motionless at boot for a few seconds before slowly spinning up. So the temp probe is the control source for the C-Pro fans and it still blasts? Link to comment Share on other sites More sharing options...
Manujito Posted November 25, 2018 Author Share Posted November 25, 2018 The ML are PWM, don’t require a voltage blast to start, and mine even sit motionless at boot for a few seconds before slowly spinning up. So the temp probe is the control source for the C-Pro fans and it still blasts? Yep that's exactly what happens. I might need to configure something differently but I can't think of what to. Link to comment Share on other sites More sharing options...
c-attack Posted November 25, 2018 Share Posted November 25, 2018 Can you post a screenshot of your Commander Pro Performance Tab with the fan profile selected so we can see it? Link to comment Share on other sites More sharing options...
Manujito Posted November 25, 2018 Author Share Posted November 25, 2018 Ok I think I might have just fixed it. The fans type was set to "Auto" in Corsair Link, I switched all of them to 4 pin, shut down the PC. And this time on startup everything was silent. I can't believe I never thought of checking that little box, I could've saved both of us a bit of time! Anyway, thanks a lot for your help, at least knowing that yours did not behave as mine made me realize that it was not normal behaviour! :) Link to comment Share on other sites More sharing options...
c-attack Posted November 25, 2018 Share Posted November 25, 2018 Good to know. Auto “should work”, but I’ll remember this as a future troubleshooting step. Mine are all set individually to DC or PWM and I expected auto to work for Corsair fans. Perhaps on Auto it is doing a fan check at each boot to determine type. Link to comment Share on other sites More sharing options...
Manujito Posted November 25, 2018 Author Share Posted November 25, 2018 Good to know. Auto “should work”, but I’ll remember this as a future troubleshooting step. Mine are all set individually to DC or PWM and I expected auto to work for Corsair fans. Perhaps on Auto it is doing a fan check at each boot to determine type. That might actually be the reason, and I thought "auto" would work too. At least I know one more thing now. Thanks again! ;): Link to comment Share on other sites More sharing options...
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