How to set an egpu on imac 5k 2017?
 
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How to set an egpu on imac 5k 2017?  

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cuppino
(@cuppino)
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Joined: 2 years ago
 

so ... I install windows and all the apple bootcamp drivers (dgpu included), disable dgpu, connect egpu and install the official amd drivers and should it go?

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme Core
Osx 10.15.4
Windows 10 pro 1909 - 18363.815 (bootcamp with external ssd 1tb Samsung evo 860)


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Jyin
 Jyin
(@jyin)
Estimable Member
Joined: 2 years ago
 

That’s basically what I did, but your mileage may vary.
You are using different eGPU/GPU combo than I.

J

2017 27" iMac 5K (RP580) [7th,4C,K] + RTX 2080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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cuppino
(@cuppino)
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Joined: 2 years ago
 

have you activated the igpu, or did not you need it?

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme Core
Osx 10.15.4
Windows 10 pro 1909 - 18363.815 (bootcamp with external ssd 1tb Samsung evo 860)


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Jyin
 Jyin
(@jyin)
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Joined: 2 years ago
 

I don’t use the internal display much.
I don’t know if you can activate the iGPU on iMac.

I simply connected 3x 4K displays to the Vega and use them as primary work-space.

J

2017 27" iMac 5K (RP580) [7th,4C,K] + RTX 2080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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cuppino
(@cuppino)
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Joined: 2 years ago
 

I had activated the igpu following a guide, but no use.
I reinstalled windows and installed version 1803, installed the various drivers and connected egpu to the tb3 near the ethernet port. Disable the dgpu, install the official amd drivers for the Vega 64, imposed shows only screen 2 on Windows (screen 2 is my TV). It seems all perfect, but when I launch a game the fps are very low. At this point I throw in the towel! Perhaps the egpu is not for me. I return everything to amazon. Although I'm really sorry. Too bad because in mac os everything works without problems :’(

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme Core
Osx 10.15.4
Windows 10 pro 1909 - 18363.815 (bootcamp with external ssd 1tb Samsung evo 860)


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mac_editor
(@mac_editor)
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Joined: 3 years ago
 

For iMacs that have non-Intel GPUs, IIRC the iGPUs are not wired to anything/inactive so they cannot be used. iGPU activation hence applies for iMacs that come in iGPU-only configs.

purge-wranglertbt-flashpurge-nvdaset-eGPU
Insights Into macOS Video Editing Performance

Master Threads:
2014 15-inch MacBook Pro 750M
2018 15-inch MacBook Pro

 
2019 13" MacBook Pro [8th,4C,U] + RX Vega 64 @ 32Gbps-TB3 (Mantiz Venus) + macOS 10.14.6 & Win10 [build link]  


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cuppino
(@cuppino)
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Joined: 2 years ago
 

this situation is absurd! The egpu works, I have no error 12 but there is something that prevents you from exploiting it correctly. I can not believe there is not a solution.
I've also set high performance on windows, but it did not help.

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme Core
Osx 10.15.4
Windows 10 pro 1909 - 18363.815 (bootcamp with external ssd 1tb Samsung evo 860)


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mac_editor
(@mac_editor)
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Joined: 3 years ago
 

@cuppino What iMac config. do you have exactly? Please write that in your signature.

Ideally your system would work as follows on internal monitor:

  • iMac GPU driving it
  • Apps can be made to use eGPU (Windows 1803+)
  • If iMac dGPU has been disabled, internal display cannot be used for accelerating anything

 

You can check the GPU being used in the Task Manager's performance section in Windows. Please provide screenshots of the same.

purge-wranglertbt-flashpurge-nvdaset-eGPU
Insights Into macOS Video Editing Performance

Master Threads:
2014 15-inch MacBook Pro 750M
2018 15-inch MacBook Pro

 
2019 13" MacBook Pro [8th,4C,U] + RX Vega 64 @ 32Gbps-TB3 (Mantiz Venus) + macOS 10.14.6 & Win10 [build link]  


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cuppino
(@cuppino)
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Joined: 2 years ago
 

I have updated my signature sistama.
I use the official drivers amd 18.11.2 and use windows 10
pro 1803.
I disabled dgpu and integrated imac monitor.
The egpu is connected in hdmi with my tv.
In windows I set "show only screen 2" (my tv).
Everything works, but the egpu "does not push".
With the same graphic settings the dgpu we do much better.

Cattura

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme Core
Osx 10.15.4
Windows 10 pro 1909 - 18363.815 (bootcamp with external ssd 1tb Samsung evo 860)


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Jyin
 Jyin
(@jyin)
Estimable Member
Joined: 2 years ago
 

Have you tried non-game software? Like Heaven to test it out.
Here's what mine looks like while running it.

As you can see on the Display settings, I have 3x 4K display in Eyefinity Config, using the Vega.

Heaven Trimmed

J

2017 27" iMac 5K (RP580) [7th,4C,K] + RTX 2080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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