Is it possible to have iGPU and dGPU enabled in windows without eGPU?
 
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Is it possible to have iGPU and dGPU enabled in windows without eGPU?  

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svit dolenc
(@svit_dolenc)
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Joined: 6 months ago
 

I am wondering if is possible to have iGPU and dGPU enabled in windows without eGPU and switch between them? I got the iGPU to show in windows with efi loader but dGPU is still always on and iGPU does not turn on. 

I have macbook pro 16 2019 i9, radeon 5500m 4gb

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This topic was modified 6 months ago

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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itsage
(@itsage)
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Joined: 4 years ago
 

@svit_dolenc, The Intel iGPU in 2018-2019 15-in and 16-in MacBook Pro is not functional. Even though you can force-activate it through an EFI boot loader, the iGPU can't work properly. Many of us have tried to use it for powering the internal display without success.

 

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2013 Mac Pro (FP D500 x2) [3rd,12C,E] + RX 5700 XT @ 16Gbps-TB2>TB3 (Mantiz Saturn Pro) + macOS 11 [build link]  


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Dope
 Dope
(@dope)
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Joined: 2 years ago
 
Posted by: @itsage

@svit_dolenc, The Intel iGPU in 2018-2019 15-in and 16-in MacBook Pro is not functional. Even though you can force-activate it through an EFI boot loader, the iGPU can't work properly. Many of us have tried to use it for powering the internal display without success.

 

This is partially true and partially false. 2018-2019 15”-16” MBPs are able to activate both built in graphics and also “utilize” them under windows. THEY KEY STEP IS TO NOT ATTACH THE IGPU TO THE INTERNAL DISPLAY. However, only the 16” MPBs are able to fully utilize both. Let me explain..

For the 15” MPBs, if you efi activate the igpu and run it with the default generic windows display driver, you can assign applications to use it. I tried with edge browser and saw activity in task manager. But without proper intel drivers, functionality is limited, and as you might already know, installing intel drivers will result in code 43 on dgpu. 

You can also, efi force activate igpu, install intel drivers and assign it to the application you’re using. It has full functionally as far as I can tell. In premiere you can see it hardware accelerating h.264/5. 

The problem with this option is the display is only refreshing at 1hz (even though the igpu is fully rendering) due to all video output going through the dgpu and because of the error 43 on the dgpu the default drive is Microsoft basic display driver.

For 16” MBPs, you can active both, install proper drivers, and utilize all feature just as long as you assign them to the application you’re using. 

I saw in adobe premiere that I was able to utilize both graphics cards. For decode and encode using accelerated quick sync h.264 h.265 hevc, and for graphics/effects, it was using the mercury engine AMD graphics. Just make sure you set up everything correctly in the preferences menu. 

Initially I didn’t think there was much of a difference, hardware wise, between the 15” and 16”. But for some reason when you install proper intel drives on the 16”, you don’t get code 43. I hope it’s to due to the difference in codes in the efi files. And if you are capable and reading this, please fix the codes in the efi file for the 15” MPBs, I really want to use adobe premiere with my 2019 15” MPB. Thanks in advance. 

 

This post was modified 5 months ago

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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