Issue since Big Sur: Fan of RX Vega 64 randomly runs full speed for 15 secs
 
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Issue since Big Sur: Fan of RX Vega 64 randomly runs full speed for 15 secs  

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raybanner
(@raybanner)
Eminent Member
Joined: 4 years ago
 

Hello eGPU friends,

I'm running a RX Vega 64 inside a Razer Core X with a Corsair SF600 PSU. Until recently, everything was running without any noise from the eGPU, I mean really zero fan noise.

Since updating to Big Sur from Mojave, the fans of the RX Vega 64 runs full speed for 15 seconds every once in a while. Sometimes it is just a few times in hours, but it also happens that the fans keep spinning full speed every 1-2 minutes for 15 seconds each time.

Any idea what this could be? It is driving me nuts to be honest, especially when you get used to the zero fan noise with the upgrade to the SF600 PSU.

How can I check issue with software on my mac? I have iStats Menus, but I somehow can't see anything happening there.

Any advice would be great!

MacBook Pro 15" from 2018
RX Vega 64 in Razer Core X with Corsair SF600 PSU


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Mini i5
(@mini-i5)
Prominent Member
Joined: 2 years ago
 

@raybanner

That’s been an issue for others playing WOW on MacOS.

When is it happening on your setup? 

 

2018 Mac Mini + AMD RP W5500 (Sonnet Breakaway Box 650) Monterey 12.0 + Windows 21H1

 
2018 Mac Mini [8th,6C,B] + RP W5500 @ 32Gbps-TB3 (Sonnet Breakaway 650) + macOS 11.6 & Win10 21H1 [build link]  


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raybanner
(@raybanner)
Eminent Member
Joined: 4 years ago
 

It just happends randomly, like when using Safari. I don't play games. I use some graphic tools, but thats it. I just also noticed that this weird behaviour also happens when my mac is in sleepmode.

I took a screenshot from the iStat Menu's GPU section. Do you notice anything crazy here? The memory on the RX Vega 64 is always somehow full. The power is always around 70-80W.

Are these normal numbers for let's say "office" activities?

CleanShot 2021 02 11 at 02.20.35@2x
This post was modified 9 months ago

MacBook Pro 15" from 2018
RX Vega 64 in Razer Core X with Corsair SF600 PSU


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Mini i5
(@mini-i5)
Prominent Member
Joined: 2 years ago
 

@raybanner

Are you running 11.0 or 11.2.1? 

External display? 

 

2018 Mac Mini + AMD RP W5500 (Sonnet Breakaway Box 650) Monterey 12.0 + Windows 21H1

 
2018 Mac Mini [8th,6C,B] + RP W5500 @ 32Gbps-TB3 (Sonnet Breakaway 650) + macOS 11.6 & Win10 21H1 [build link]  


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raybanner
(@raybanner)
Eminent Member
Joined: 4 years ago
 

I'm running 11.2 and yes, it is connected to an external display.

MacBook Pro 15" from 2018
RX Vega 64 in Razer Core X with Corsair SF600 PSU


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Mini i5
(@mini-i5)
Prominent Member
Joined: 2 years ago
 

@raybanner

Just based on reading a few user forums, it sounds like there are bugs in the Vega 64 driver for Big Sur. 🙄

 

2018 Mac Mini + AMD RP W5500 (Sonnet Breakaway Box 650) Monterey 12.0 + Windows 21H1

 
2018 Mac Mini [8th,6C,B] + RP W5500 @ 32Gbps-TB3 (Sonnet Breakaway 650) + macOS 11.6 & Win10 21H1 [build link]  


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douirc
(@douirc)
New Member
Joined: 4 years ago
 

you're not alone.  my ASRock Vega 64 Phantom Gaming does exactly the same thing.  matter of fact, if you look, your fan is probably going to zero RPM, causing the GPU to heat up, hit a trigger threshold and kick on the fan for emergency cooling (high RPM that's loud/obnoxious).

at first I thought I screwed something up with OpenCore when I upgraded but it's def not OC, it's macOS.

anyone find a fix for this?  would love to get my Vega 64 working properly again.

thanks!

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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Session
(@ttys069)
Active Member
Joined: 3 years ago
 

@douirc, I've had a similar issue on my MSI Airboost Vega 56. It's a blower style card, and does not feature a fan stop mode (I confirmed this by running it in Windows and the fan never turns off), but in macOS until I really push the GPU it doesn't spin the fan up at all. I'm still on Catalina as my trick to get the card not to overheat is to use VGTab, and basically play with the power play tables. VGTab has a fan curve editor and I think I just lowered the threshold and the fan stop behavior was eliminated. I cannot remember exactly which threshold I selected to make that work. I could post my modified kext if that helps you figure anything out at least. 

I would like to update to Big Sur or later, but I've always been confused about how kext's were handled in those OS's. I think it's possible to use OpenCore to inject a modified kext? Right now I'm just running with SIP disabled (which I'd like to avoid if possible), and it just loads the modified kext. I'd really like to know more about if it's possible to modify the PowerPlay tables via OpenCore, so I could bring that "fan fix" across to later version of macOS.

 

2013 MacBook Pro - i7-4960HQ w/ 750M
Sonnet Breakaway Box (x2) - MSI Airboost Vega 56, Intel X520 NIC (Smalltree Flashed)


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