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MP All Models AMD Polaris, Vega, & Navi GPU macOS Support
- Thread starter MisterAndrew
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I have installed a Sapphire Pulse RX Vega 56 in my MP5,1 (like MisterAndrew, I think) running High Sierra.
Idle fan speed is 700 rpm which seems normal for HS. The Vega fans turn up under load to 1650 rpm but they never turn back to idle speed when load is over. The only thing I can do is a restart to bring them back down to idle speed.
Is this a common behavior in High Sierra or is there another solution to this problem?
Idle fan speed is 700 rpm which seems normal for HS. The Vega fans turn up under load to 1650 rpm but they never turn back to idle speed when load is over. The only thing I can do is a restart to bring them back down to idle speed.
Is this a common behavior in High Sierra or is there another solution to this problem?
Yes, it’s a bug affecting some Vega GPUs. Submit a bug report on the Apple developer bug report page.
To reduce the fan speed temporarily, try the workaround by MisterAndrew and others — play a H265 HEVC video on IINA.
Unfortunately this workaround does only work in Mojave but has no effect in High Sierra for me.
MisterAndrew ... Do your Vega 56 fans turn back to idle speed after load in High Sierra?
Yes, that's the new fan issue we've been experiencing with the Pulse 56 and the one I've reported to Apple. If you have it installed in a genuine Mac Pro 5,1 then I recommend submitting a bug report.
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I'll have to try it. I no longer have High Sierra installed on one of my internal drives, but I do on an external disk. However it is behaving under High Sierra is how it's going to stay unless it's fixed by a firmware update. All new development will be with Mojave.
I got this response about this exact issue from Apple today:
"Engineering has provided the following information regarding this issue:
Please know we have been unable to reproduce the issue and AMD hasn’t been able to reproduce the issue either."
Apple's response is odd and disappointing. The issue is widespread. Users report the same issue on several forums. Apple has decided to ignore the problem, because the cMP is a niche and no longer relevant to them, and the issue has not been blown up on social media.
We need a prominent user to speak up about how Apple intentionally keeps the cMP obsolete, with no fixes and updates, while providing no real replacement for Apple's most expandable workstation ever.
I agree it is odd that they haven't been able to reproduce the issue. Another odd thing is that the test machine's configuration they shared was using the older Mojave build 18A353d and firmware version 87. You'd think they would keep their test machines up to date.
Maybe this could be solved by software/new drivers as well? Because my Vega behaves a lot better in Mojave without any change in firmware (-> fully stopped fans at idle or playing HEVC video for reducing fan speed)
However, it would be great if you could check your Pulse 56 under High Sierra. I'm curious if your GPU fans return to idle speed after load automatically or if that HEVC workaround works for you in HS.
So, is there a Vega 56 card that works perfectly in Mojave with no fan issues then?
Hi all!! Its possible fix fan speed that AMD Gigabyte RX 64 OC Gaming 8 GB with Sapphire Radeon BIOS? Looks like its compatible BIOS, and im thinking if flash its fix this issue... Im using Hackintosh, and its very Good with VegaTab64 kext edit...
"Fan Speed(%)"=15
"Fan Speed(RPM)"=772
"Temperature(C)"=34
"Fan Speed(%)"=15
"Fan Speed(RPM)"=772
"Temperature(C)"=34
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I don’t believe so, but the fan issue on models like the Pulse that don’t have the main high speed idle issue isn’t a big deal. If the fans spin up under heavy load you just need to play a video to get them to stop.
I just tried LuxMark in High Sierra. My fans aren't returning to normal when a video is played. How strange. I didn't have this issue before the 138.0.0.0 firmware update.
You could try the Sapphire bios. I don't know if the Gigabyte card readily accepts bios flashes. It also has a different port layout.
Are you sure about this? Funny, it was the reason why I updated to 138 firmware because I was hoping this would fix this issue. I was on 089 FW before and there was no difference in how the fans were behaving. Now I really believe that this is a kext issue only.
Anyway, thanks for testing!
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Furmark? On OSX?
Haven't got any Windows on this machine, moreover, it wouldn't be using my kext-edits...
TBH, no idea. My GPUTest was downloaded few years ago.
Anyway, run the GPUTest_GUI inside package should give you a decent GUI to run Furmark.
Great prices on AMD cards right now. I wasn't sure if we'd ever see prices return to MSRP. Pulse RX Vega 56 is $399.99 and Red Dragon RX Vega 56 is $379.99 with $20 rebate at Newegg. The Nitro+ RX Vega 64 is $499.99, but too bad it's too long to fit well in the cMP. And the Pulse RX 580 8GB is $239.99 through Sunday.
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Yeah, but depends on the card. The first post in this thread is updated. The Pulse 56 is mostly issue free. The Red Dragon 56 would probably be a good choice also (I know it runs fine since I've tested the bios, but I haven't tested fitment. It's a little longer than the Pulse, but it's 2 slot so that's nice and has 8+6 pin power connectors rather than dual 8-pin.). Those happen to be the least expensive Vega cards as well.
