Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
@h9826790 - sorry, one more stupid question:

I just looked at my MP3,1 with a Radeon 7950 in it running Catalina. The fans on that graphics card are constantly running - even at idle. Based on what you wrote before, I'm assuming that since the 7950 is an older card, its BIOS is set in such a way that the fans will run constantly and only ramp up under load. Whereas, the Vega 64 being a newer card, has its BIOS telling it that it should only turn its fan on after it reaches a certain temperature threshold.

Is my understanding correct?
Correct

The reason I ask (and also why I said this is a stupid question), but my newest GPU is a GTX 1080Ti installed in a Windows box. My experience with newer-ish graphics cards ends with that, and the 1080Ti's fans run constantly irrespective of load. All other previous GPUs I've owned have had cooling fans that constantly spun at idle like the 1080. The Vega 64 is the first card I've owned that didn't do that.

Just want to make sure nothing's amiss with my setup.
1080Ti support this function. Just depends on the manufacture how to programme the fan curve


Screenshot 2021-01-28 at 03.15.40.png
 
  • Like
Reactions: amstel78
There’s way too many posts to know if this has been covered and from what I managed to see I couldn’t find the answer.
Someone please tell me I just didn’t buy a very expensive brick
I just put a 6800xt card in an enclosure on the most up to date Big Sur and it doesn’t work.
 
So I’ve learned. I was searching through to see if anyone had any indication of a timeframe but 70+ pages is a lot to go through

The Navi 21 GPUs are very new so discussion about them would be limited to the few last pages of this thread. I apologize for the confusion of the first post. It tracks the device IDs included in the drivers and not all of the GPUs listed have been tested by users. I’ve updated the first post to show that the 6800, 6800 XT, and 6900 XT are not supported. What I can recommend is if you need a new GPU buy one from Apple or select a 3rd party GPU that is widely known to be supported. GPUs that were recently released and are not sold in any Mac are often not supported.
 
  • Like
Reactions: h9826790
AMD announced the new Radeon RX 6700 XT graphics card today. It's a 230 watt card with a suggested price of $479. Of course it might not be supported under macOS when it releases. It looks like the first Navi 22 GPU. The device ID could be 0x73DF since the 6800, 6800 XT, & 6900 XT cards are 0x73BF.

 
Last edited:
I'd first be more concerned with Rosetta potentially disappearing in the near future vs. any GPU improvements/upgrades on macOS side. For anyone using a Mac for professional work, this could be a huge deal moving forward. More machines will be stuck on Catalina 10.15.7 versions and those baked-in GPU drivers. No alternative for M1-based at the moment.
 
"three Navi 21 GPUs coming to Macs" - can you cite your source please?
I discussed it on November 17th here: https://forums.macrumors.com/threads/amd-polaris-vega-navi-gpu-macos-support.2083168/post-29265088

Apple only creates frame-buffer personalities for GPUs they sell, either in a Mac or in some cases a 3rd party GPU they have sold through the Apple store such as the Blackmagic eGPUs. It’s likely those GPUs will be MPX modules for the 7,1 or 8,1 Intel based Mac Pros.
 
I discussed it on November 17th here: https://forums.macrumors.com/threads/amd-polaris-vega-navi-gpu-macos-support.2083168/post-29265088

Apple only creates frame-buffer personalities for GPUs they sell, either in a Mac or in some cases a 3rd party GPU they have sold through the Apple store such as the Blackmagic eGPUs. It’s likely those GPUs will be MPX modules for the 7,1 or 8,1 Intel based Mac Pros.
LOL, that was 4 months ago!

Absolutely pathetic on Apple's part to limit their own consumers like this and equally pathetic for Apple consumers to just let Apple get away with it.
 
LOL, that was 4 months ago!

Absolutely pathetic on Apple's part to limit their own consumers like this and equally pathetic for Apple consumers to just let Apple get away with it.

New GPUs from Apple usually show up in the drivers months ahead of their release. These are specific Apple GPUs by AMD, not the PC versions that are currently available. We should expect the drivers to be functional when Apple is getting ready to release the products.
 
I put an AMD RX6900XT into a 5,1.

It even won’t post (chime)

 
  • Like
Reactions: Ausdauersportler
I put an AMD RX6900XT into a 5,1.

It even won’t post (chime)

slightly off topic:

Have you ever been able to solve such a no post situation by hardware changes or software updates yourself?

I am asking because we have a bunch of AMD (Baffin, Polaris, Ellesmere) mobile cards (MXM slot) not posting (and not running) in iMac Mid 2011 while perfectly posting and running in older iMac Late 2009 and Mid 2010 systems. This is confusing...

EDIT: We solved this for at least one model through modifications on the MXM card.
 
Last edited:
slightly off topic:

Have you ever been able to solve such a no post situation by hardware changes or software updates yourself?

I am asking because we have a bunch of AMD (Baffin, Polaris, Ellesmere) mobile cards (MXM slot) not posting (and not running) in iMac Mid 2011 while perfectly posting and running in older iMac Late 2009 and Mid 2010 systems. This is confusing...

not really as I am no firmware engineer. I have slight knowledge of the Mac Pro Firmware when it comes to reconstruction, cleanup and adding some firmware modules. But when it comes to debugging I lag knowlege and tools.

i have some experience how GPUs interact with the Firmware as we MP users mod GPU bios to add uga support for bootscreens. This Firmware boot loop I have seen with bricked GPUs or GPU mods (lound chime, chime, chime etc).

so my conclusion with adding an uga gpu to the 6900 and getting the firmware loop.
 
Thanks for keeping the thread up to date, but it's really strange now for the cMP. We have a card that has macOS driver support, but can't POST on cMP.

Anyone tried if co-installed the 6000 series card with another supported card (e.g. RX560) on the 5,1, or with another Mac EFI UGA card (e.g. 7950, or even GT120), or no monitor connected when boot, etc. would make any different?

Or even more extreme, use it via the Titan Ridge as eGPU. I know this is far from ideal, but depends on the situation, this may be useful. And at least we know if there is a way to make it work (on the cMP).
 
Last edited:
Thanks for keeping the thread up to date, but it's really strange now for the cMP. We have a card that has macOS driver support, but can't POST on cMP.

Anyone tried if co-installed the 6000 series card with another supported card (e.g. RX560) on the 5,1, or with another Mac EFI UGA card (e.g. 7950, or even GT120), or no monitor connected with boot, etc. would make any different?

Or even more extreme, use it via the Titan Ridge as eGPU. I know this is far from ideal, but depends on the situation, this may be useful. And at least we know if there is a way to make it work (on the cMP).

yes, added an efi card and it got a halve post loop instead of no post.

BONG bong bong bong....

 
  • Like
Reactions: h9826790
RX580’s were EOL’d but brought back during pandemic chip shortage for several markets. Would assume base GPU bump on MP7,1 if MPX released.
 
It appears the new Radeon Pro W6800 is supported by macOS 11.4 and later. The device ID is present in the framebuffer driver. It's Navi 21 based like the RX 6800/6900 series. It appears the Navi 23 based Radeon Pro W6600 is not yet supported.
 
  • Like
Reactions: octoviaa and ikir
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.