Racing fans fixed?

fatespawn

macrumors regular
Original poster
Feb 22, 2009
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A couple of months ago, I bought and RX580 and upgraded to Mojave. I have a 4,1 machine and fell victim to the "Racing Fan bug" that really just idled the system fans around 2000 instead of their normal < 1000RPM creating a noticeable noise. I discovered Airout written by forum member CDF. It stresses the GPU a bit, and that resets the fans to their normal speeds without relying on a 3rd party app. That worked well as an interim fix.

Well, after upgrading to 10.14.4, the bug seems to be gone. I don't know exactly what happened, but now, when I start the computer in the morning, initially the fans spin up to ~2000RPM like the bug still exists. Then after a couple of minutes they settle down back to ~800RPM without any intervention by me.

Anyone else notice a change?
 

startergo

macrumors 65816
Sep 20, 2018
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A couple of months ago, I bought and RX580 and upgraded to Mojave. I have a 4,1 machine and fell victim to the "Racing Fan bug" that really just idled the system fans around 2000 instead of their normal < 1000RPM creating a noticeable noise. I discovered Airout written by forum member CDF. It stresses the GPU a bit, and that resets the fans to their normal speeds without relying on a 3rd party app. That worked well as an interim fix.

Well, after upgrading to 10.14.4, the bug seems to be gone. I don't know exactly what happened, but now, when I start the computer in the morning, initially the fans spin up to ~2000RPM like the bug still exists. Then after a couple of minutes they settle down back to ~800RPM without any intervention by me.

Anyone else notice a change?
I have 5.1 and MFC .it does the same thing on boot and login .
 

fatespawn

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Original poster
Feb 22, 2009
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Do you mean your fans are still abnormally high or has the glitch been fixed for you?

I just rebooted to verify again. Initially, it appears the PCI fan ramps up to ~2000RPM. If I do nothing, after 3 or 4 minutes, it settles right back down to ~800. 3 weeks ago, this wasn't the case. I had to stress the GPU with something like AirOut to get the fan to reset itself.
 

startergo

macrumors 65816
Sep 20, 2018
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Do you mean your fans are still abnormally high or has the glitch been fixed for you?

I just rebooted to verify again. Initially, it appears the PCI fan ramps up to ~2000RPM. If I do nothing, after 3 or 4 minutes, it settles right back down to ~800. 3 weeks ago, this wasn't the case. I had to stress the GPU with something like AirOut to get the fan to reset itself.
No it settles down at the controlled temperature I set in the MFC. As soon it reaches the target it slows down.
 

fatespawn

macrumors regular
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Feb 22, 2009
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Oh, I see. No, I'm talking without any Mac Fan Control program running. Now, it initially ramps up to 2000RPM... then slows back down to normal, all on it's own without any intervention from 3rd party apps.
 

fatespawn

macrumors regular
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Feb 22, 2009
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In my case, that pesky fan bug is still there...
Shoot - too bad. I'll keep an eye on mine the next few days, but I've rebooted and reproduced the results numerous times. I wish I knew what was happening in the background to remedy the fan issue for me. Hopefully... it sticks :)
 
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bsbeamer

macrumors 68030
Sep 19, 2012
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Is this just an issue with 4,1>5,1 or do authentic 5,1’s also have the issue?

Have a Sapphire Pulse RX580 8GB with Mojave and never experienced this before in my native 5,1. Powered internally via dual mini 6-pin to standard 8-pin. No plugins for fans or fan controllers installed. Using NMVe with PX1 as boot. Also have PCIe SATA SSD via Apricorn Velocity Duo. Last PCIe is USB3. All SATA sleds are SSDs.

Does your GPU ID as ATY,AMD,RadeonFramebuffer or ATY,Orinoco natively?
 

h9826790

macrumors G5
Apr 3, 2014
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Hong Kong
Is this just an issue with 4,1>5,1 or do authentic 5,1’s also have the issue?

Have a Sapphire Pulse RX580 8GB with Mojave and never experienced this before in my native 5,1. Powered internally via dual mini 6-pin to standard 8-pin. No plugins for fans or fan controllers installed. Using NMVe with PX1 as boot. Also have PCIe SATA SSD via Apricorn Velocity Duo. Last PCIe is USB3. All SATA sleds are SSDs.

Does your GPU ID as ATY,AMD,RadeonFramebuffer or ATY,Orinoco natively?
I believe this bug only exist in SMC 1.39f5.
 
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macguru9999

macrumors regular
Aug 9, 2006
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I have 141.0.0.0 firmware and mojave and an rx580 sapphire.(in a 5,1) My fans are dead quiet. When I had an nvidia gtx680 installed the pci fan would spin up a bit. now nothing. maybe the rx580 uses even less power...
 

startergo

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Sep 20, 2018
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Interesting. Perhaps I should modify my card to use Orinoco. @h9826790 is your guide still a good solution for this?
I have to warn you that If you are using Windows in EFI mode you will have issues with the modified driver. There is a solution, but I would recommend using Windows in legacy mode.
 

h9826790

macrumors G5
Apr 3, 2014
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Hong Kong
I have 141.0.0.0 firmware and mojave and an rx580 sapphire.(in a 5,1) My fans are dead quiet. When I had an nvidia gtx680 installed the pci fan would spin up a bit. now nothing. maybe the rx580 uses even less power...
They are talking about a SMC bug that will spin up the PCIe and PSU fan unnecessarily.
Interesting. Perhaps I should modify my card to use Orinoco. @h9826790 is your guide still a good solution for this?
I have no idea if Orinoco framebuffer does anything about this fan speed bug. I haven't test it.

But I am sure that guide still good for modding the PULSE RX580, I did that to my own RX580, and still work as expected.
 

fatespawn

macrumors regular
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Feb 22, 2009
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I have no idea if Orinoco framebuffer does anything about this fan speed bug. I haven't test it.

But I am sure that guide still good for modding the PULSE RX580, I did that to my own RX580, and still work as expected.
My system has used theOrinoco framebuffer since I installed the RX580 back in October and I still had the fan bug back then. That's when I started using the AirOut app to slow down the fans. So, I'm not sure just changing to the Orinoco framebuffer would help, but maybe it's one of a combination of factors.
 

MVMNT

macrumors regular
Apr 28, 2010
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I’ve got a GTX680 in my 4.1>5.1 bought a dual tray cheap as the fans were spinning up on it. First install fans were actually fine on mine, but since have been running fast.

Maybe it’s fallen victim to this same “bug”?
 

h9826790

macrumors G5
Apr 3, 2014
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5,863
Hong Kong
I’ve got a GTX680 in my 4.1>5.1 bought a dual tray cheap as the fans were spinning up on it. First install fans were actually fine on mine, but since have been running fast.

Maybe it’s fallen victim to this same “bug”?
If that's the PCIe and PSU fan, most likely yes.