Did the RX 6400 work on Tahoe?

[Green206]

I have an RX 6400 card; is it possible to get it running on Tahoe?

[deeveedee]

@Green206 I imagine that your searches returned the same as mine.  

 

• Reddit: "6400 and 6500xt are Navi 24 .. there is No driver for them (also quite bad GPUs)"
• ChatGPT: Short answer: No — the AMD Radeon RX 6400 is not supported in macOS (including Tahoe).
• Dortania: "Unsupported cards include RX 6300, RX 6400..."
• The optimistic posts I found said to "wait for NootRX update"
• NootRX: Still says "Nav24 support coming soon"

Edited 19 hours ago by deeveedee

[Green206]

As a temporary solution until NootRX is released, I can install an RX 570 4 GB card in the computer, but it consumes more power.

 

Is there any other card that draws very little power and will work on Tahoe?

 

or keep the RX 6400 and plug the cable into the integrated graphics port.

 

 

Edited 18 hours ago by Green206

[deeveedee]

You could review the Dortania link that I provided for you in my previous post.  If you are considering the replacement to be temporary (I'm not so sure about that, but let's assume you're correct), then maybe you don't want to purchase another card.  If the iGPU works well enough for you, that's clearly your lowest power option at the moment.

[LockDown]

OT

What app to know how much power drawn?

[deeveedee]

@LockDown there are multiple such apps for Windows.  You should be able to find one with a search.  I'm not aware of similar apps for macOS, but they may exist, too.  If you don't want to find the app, there are published test results that you can find with a search.

 

EDIT: I stand corrected.  I did measure Radeon dGPU power in macOS.  See here.

Edited 11 hours ago by deeveedee

[Green206]

4 hours ago, deeveedee said:

@LockDown there are multiple such apps for Windows.  You should be able to find one with a search.  I'm not aware of similar apps for macOS, but they may exist, too.  If you don't want to find the app, there are published test results that you can find with a search.

 

EDIT: I stand corrected.  I did measure Radeon dGPU power in macOS.  See here.

If I use an HDMI switch and connect one cable to the dedicated card (the RX 6400) for Windows and the other to the integrated graphics for Mac, will that work, or will I have to manually switch the video source for the Mac?

[deeveedee]

@Green206 Take a look at the WhateverGreen.kext boot-arg -wegnoegpu.