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  #1  
Old 08-07-2015, 07:48 PM
Cobra_Fast Cobra_Fast is offline
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Exclamation Bug: fan custom curve graph ignores Point 5

Couldn't find any sort of bug-reporting related email address or bugtracker, so I'm posting this here. The support link in LINK leads here, too, so I guess it's okay.

When creating a custom fan curve for my H80i, the graph visualizing the curve ignores "Point 5" and cuts off at the RPM of "Point 4".
The actual fan control seems to honor this invisible point, though, and the fan spins at the correct RPM.



Bug existed ever since I started using Corsair LINK back in version 2.something. It's present right now in version 3.2.5676 on Win7 64bit.

Last edited by Cobra_Fast; 08-07-2015 at 07:55 PM.
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  #2  
Old 08-10-2015, 12:04 PM
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There are some custom curve shenanigans with Link 3.2.5676 right now and a new version is en route. I'd ask that you wait for the next version and if that doesn't solve the problem, ping us again and we'll file the bug.
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  #3  
Old 08-21-2015, 10:30 PM
Blargleflakes Blargleflakes is offline
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I think this bug still exists. I have an H100i GTX and I noticed that my fans would rev up to max pwm % at the last control point (Point 6 for my cooler).

This behavior seems to also present itself for all the other non-custom fan profiles as I initially noticed this behavior when had the fans set to quiet mode. It would mysteriously rev up to max at 40 deg C. I have this issue with the stock fans, non-stock fans, and have repeated results with another H100i GTX which I got to see if it is a hardware issue. I am using windows 10 pro with corsair link 3.2.5695.
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  #4  
Old 08-24-2015, 12:22 PM
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You may want to set Point 6 to 34 or 35.
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  #5  
Old 08-25-2015, 12:07 AM
Blargleflakes Blargleflakes is offline
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Quote:
Originally Posted by Corsair Dustin View Post
You may want to set Point 6 to 34 or 35.
I have already tried point 6 at 35 deg C before even uploading that picture, using initial custom curve settings from a fresh CL install. It exhibits the same behavior where the fans revs up to max rpm at 35 deg C instead of the 32 in that pic.
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  #6  
Old 08-25-2015, 12:18 PM
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Actually, now that I look at it, the other issue is that you have all these points set at 20% when their minimum is supposed to be 40%.
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  #7  
Old 08-25-2015, 09:33 PM
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Quote:
Originally Posted by Corsair Dustin View Post
Actually, now that I look at it, the other issue is that you have all these points set at 20% when their minimum is supposed to be 40%.
You seem to be quite fixated at that one fan curve picture that I have posted, when I have mentioned that it affects ALL fan curves including the non adjustable ones such as quiet, balanced, and performance modes. If it takes more images to convince you that there is an issue then here are some more:



Also if the minimum is supposed to be 40% then why does quiet mode appear to go below that? I don't have the percentages but just from looking at the two different curves it clearly is below the 40% line from the custom curve. I also do not see why being below 40% should cause issues. In fact the current curve I have now seems to work fine as long as I don't make point 6 a contributing part of the curve and that curve has half of its points below 40%.


Last edited by Blargleflakes; 08-25-2015 at 09:50 PM. Reason: 1. Additional example
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Old 08-25-2015, 10:16 PM
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Quote:
Originally Posted by Blargleflakes View Post
I also do not see why being below 40% should cause issues.
Some fans below that % are subject to stalling and if that happens they would go to full speed to synch again.
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Old 08-25-2015, 10:58 PM
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Quote:
Originally Posted by wytnyt View Post
Some fans below that % are subject to stalling and if that happens they would go to full speed to synch again.
Based on my current setup the fans just seem to stall if I push the pwm % low enough.



Anyways, I think that is besides the point with the current issue that I am having, which is the last temperature point not being followed and causing the fans to rev up to max RPM.
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  #10  
Old 08-26-2015, 09:34 AM
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Question Should the H80iGT minimum be 25%

Quote:
Originally Posted by Corsair Dustin View Post
Actually, now that I look at it, the other issue is that you have all these points set at 20% when their minimum is supposed to be 40%.
Why is the minimum 40% please? Below you can see for the H80iGT 25% to 100% works well.

I would like to use PWM 0% to totally stop the fan.
Attached Images
File Type: png H80i PWM vs. RPM.png (40.7 KB, 5266 views)

Last edited by red-ray; 01-14-2016 at 03:48 PM.
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  #11  
Old 09-13-2015, 04:43 PM
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Quote:
Originally Posted by Corsair Dustin View Post
There are some custom curve shenanigans with Link 3.2.5676 right now and a new version is en route. I'd ask that you wait for the next version and if that doesn't solve the problem, ping us again and we'll file the bug.
I'm on 3.2.5695 now and Point 5 still doesn't seem to be displayed. However, I cannot confirm the other wonkiness others have meanwhile pointed out in this thread.

Quote:
Originally Posted by red-ray
I would like to use PWM 0% to totally stop the fan.
That's something I've been missing on my H80i, too, and I've yet to see if the Commander Mini can stop 3-pin fans (since it's still in the mail). But it's more of an inconvenience than a dealbreaker, I can live with it.

Last edited by Cobra_Fast; 09-13-2015 at 04:47 PM.
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Old 09-13-2015, 05:44 PM
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Quote:
Originally Posted by red-ray View Post
Thank you for the chart dude !
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  #13  
Old 09-15-2015, 01:54 PM
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Quote:
Originally Posted by red-ray View Post
Why is the minimum 40% please? Below you can see for the H80iGT 25% to 100% works well.

I would like to use PWM 0% to totally stop the fan.
The minimum is 40% to prevent fan stalling.
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  #14  
Old 09-15-2015, 02:04 PM
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Question 40% for 3-pin and 25% for 4-pin PWM?

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Originally Posted by Corsair Dustin View Post
The minimum is 40% to prevent fan stalling.
40% makes sense for CoolIT 3-pin fans, but from the plot the Asetek firmware seems to allow a low limit of 25% and I suspect the same will be the case for 4-pin PWM CoolIT.
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  #15  
Old 09-15-2015, 02:16 PM
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Honestly I suspect it's probably a global minimum implemented as a safeguard, since we can't predict how non-Corsair fans will react to low PWM signals/voltages.
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