Using internal display on iMac for windows 10?
 
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Using internal display on iMac for windows 10?  

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uchlee
(@uchlee)
Eminent Member
Joined: 3 years ago
 

Update: It's iMac 2015 Late, not 2016

Hi,

I got Aorus gaming box and have been testing it on Windows 10 64bit with iMac 2016. It works just fine with an external display but I can't use it for accelerated internal display. 

  • Installed the latest Nvidia driver
  • Disabled internal intel GPU
  • Nvidia utility says eGPU is powering Internet Explorer
  • If I run 3D games in full screen mode, frame rate is 2 ~ 3 fps.

 

Can someone please give me a direction to solve this issue?

 

Thanks in advance.

iMac Retina 4K, 21", Late 2015, Mojave, iGPU 6200
MBP Retina, 13", Early 2015, Mojave, iGPU 6100
Aorus Gaming Box GTX1080


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

What are the specs of your 2015 iMac? In order for eGPU internal display mode to work, the Intel iGPU has to be present and active.

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2020 13" MacBook Pro [10th,4C,G] + RX 5700 @ 32Gbps-TB3 (Prototype eGPU Enclosure) + macOS 10.15.4 & Win10 1903 [build link]  


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uchlee
(@uchlee)
Eminent Member
Joined: 3 years ago
 

Hi,

It's iMac 2015 Late with Intel Iris Pro Graphics 6200 1536MB. What are the steps to use eGPU for internal display after activating internal GPU?

iMac Retina 4K, 21", Late 2015, Mojave, iGPU 6200
MBP Retina, 13", Early 2015, Mojave, iGPU 6100
Aorus Gaming Box GTX1080


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

If you see both the Intel Iris Pro iGPU and Nvidia GTX 1070 eGPU in Device Manager without any yellow triangle, internal display mode should work. Do you see an icon like this in the taskbar?

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 13" MacBook Pro [10th,4C,G] + RX 5700 @ 32Gbps-TB3 (Prototype eGPU Enclosure) + macOS 10.15.4 & Win10 1903 [build link]  


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uchlee
(@uchlee)
Eminent Member
Joined: 3 years ago
 

yes. Applications other than Overwatch (3D game) runs on eGPU but not Overwatch.

iMac Retina 4K, 21", Late 2015, Mojave, iGPU 6200
MBP Retina, 13", Early 2015, Mojave, iGPU 6100
Aorus Gaming Box GTX1080


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

Maybe go into Nvidia Control Panel and play with the settings.

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 13" MacBook Pro [10th,4C,G] + RX 5700 @ 32Gbps-TB3 (Prototype eGPU Enclosure) + macOS 10.15.4 & Win10 1903 [build link]  


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uchlee
(@uchlee)
Eminent Member
Joined: 3 years ago
 

It only works when the overwatch uses "Window mode," not "full screen mode." 🙁

In 'Configure Surround, PhysX' there is no internal LCD in the chart, only the external monitor.

iMac Retina 4K, 21", Late 2015, Mojave, iGPU 6200
MBP Retina, 13", Early 2015, Mojave, iGPU 6100
Aorus Gaming Box GTX1080


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bootz
(@bootz)
Trusted Member
Joined: 3 years ago
 

uchlee, 

Did you ever solve this problem? I have the exact same hardware (iMac 4k Late 2015 - Iris Pro 6200 iGPU only) and cannot get the eGPU to run applications unless I:

1) Connect an external monitor to the eGPU
2) Disable the internal display

Otherwise, I get the message that the eGPU cannot be used because there is no display connected to it. It is a shame because it turns the machine into a gaming beast. Unfortunately, I can't get it to work with the internal display, which was the whole point.

I also tried installing (and uninstalling) multiple drivers - the Gigabyte Nvidia drivers, Official Nvidia Desktop drivers, and Official Laptop drivers. All gave the same result.

I'm starting to think it has something to do with the Intel display drivers. Both display adapters always show as Active in Device Manager. However, Intel does not list the Iris Pro 6200 as offering Switchable Graphics. Seems like this would be a problem for Optimus to activate?

https://www.intel.com/content/www/us/en/support/articles/000005669/graphics-drivers.html

Last Reviewed: 04-Dec-2017
Article ID: 000005669

The following Intel Graphics support the Switchable Graphics feature if enabled by the computer manufacturer:

  • Mobile Intel® 4 Series Express Chipset Family
  • 1st Generation Intel® Core™ Processors with Intel® HD Graphics
  • Intel® HD Graphics 3000/2000
  • Intel® HD Graphics 4000/2500
  • Intel® Iris® Pro Graphics 5200, Intel® Iris® Graphics 5100, or Intel® HD Graphics 5000/4600/4400/4200

I will certainly keep you up to date on my findings...

iMac 4k 2015 - 21.5" (iGPU only)
i5-5675R @ 3.10 GHz
8 GB RAM
Aorus Gaming Box 1070 via TB3 > TB2 adapter
Windows 10.0.17134


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