Level 1

8 points

2020 iMac boot camp

I have a 2020 iMac (Mid-tier) and I've successfully loaded Windows 10 Home on my external SanDisk Extreme Pro SSD using WinToUSB. When I try to run the BCA software it hangs right at the beginning. I was able to get sound, networking and bluetooth all working, but I not the Radeon 5300M. This means I have the windows generic display driver and cannot use dual monitors or the full benefit of the graphics card.

I've tried downloading all kinds of AMD drivers, but they fail.

Where are the drivers for the 5300M? Is there any known workarounds for the BCA not loading or the AMD drivers?

iMac 27″, macOS 10.15

Posted on Aug 19, 2020 6:37 PM

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Loner T

Level 9

59,536 points

Posted on Aug 20, 2020 10:08 PM

JamesFMann wrote:

I've tried downloading all kinds of AMD drivers, but they fail.

Have you tried https://www.amd.com/en/support/kb/release-notes/apple-boot-camp ?

Where are the drivers for the 5300M? Is there any known workarounds for the BCA not loading or the AMD drivers?

An external disk installation has known issues. Do you want to consider installing it on the internal disk and testing the BC drivers?

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26 replies

Loner T

Level 9

59,536 points

Aug 24, 2020 8:53 PM in response to Volkswagen04

Volkswagen04 wrote:

I know AMD is responsible for drivers, but a part of me thinks that Apple probably doesn’t make it any easier.

What is the PID/VID of the GPU?

Aug 25, 2020 6:49 AM in response to Loner T

Vendor: AMD (0x1002)

Device ID: 0x7319

JamesFMann Author

Level 1

8 points

Sep 1, 2020 8:18 PM in response to PJ_in_RC

This worked, thanks! I used the blue version and followed step by step the guys video. I had no issues at all and my second 2k monitor works flawlessly.

JamesFMann Author

Level 1

8 points

Sep 2, 2020 5:24 AM in response to Loner T

What version is bootcamp assistant showing now? I downloaded the support files early last month and I think it was version 1082

Loner T

Level 9

59,536 points

Sep 2, 2020 2:57 PM in response to Volkswagen04

I am not aware of a 5K resolution supported in Windows. It should be 4K, which is what you seem to have.

Sep 3, 2020 6:27 PM in response to Loner T

Loner T wrote:

I am not aware of a 5K resolution supported in Windows. It should be 4K, which is what you seem to have.

5120x2880 has always been supported by the official Apple/AMD Boot Camp graphics drivers in Windows 10 on both my 2015 and 2019 5K iMacs.

You can see the 2020 5K iMac running in 5120x2800 with the stock Boot Camp drivers in Windows 10 in this video review by Vadim of Max Tech.

There are at least two reports on BootCampDrivers.com of their modified August 2020 drivers supporting 5K in the 2019 iMacs, and I don't recall reading any reports there of 5K not working on the 2020 models with their modified drivers.

Sep 3, 2020 9:37 PM in response to Loner T

Loner T wrote:

Can you check the Active Signal Resolution when running in 5K on Windows?

The Active Signal Resolution when running in 5K on Windows is 2560x2880.

As I recall, Apple’s custom timing controller for the 5K display treats it as two 2560x2880 displays side-by-side. The display driver takes these and presents a single 5120x2880 display to the OS (or something like that).

(There’s currently an amusing quirk on my 2019 iMac with the official Apple/AMD Boot Camp drivers: if I have Night Light turned on and launch a game at 2560x1440, then alt-tab back to my desktop at 5120x2880, the left half of the display will have the Night Light applied and the right half will not. Fortunately, this is quickly remedied by toggling Night Light off and back on.)

PJ_in_RC

Level 1

19 points

Sep 2, 2020 5:45 PM in response to Volkswagen04

The 3840 x 2160 is the resolution I have and it works fine. Yes I did just run the setup.exe in the Windows Support Bootcamp folder.

You said you had the Bluetooth working, did you find a driver or did you use my work around?

Glad I was able to help.

Loner T

Level 9

59,536 points

Sep 3, 2020 10:27 PM in response to Community User

Colonel Blimp wrote:

The Active Signal Resolution when running in 5K on Windows is 2560x2880.

As I recall, Apple’s custom timing controller for the 5K display treats it as two 2560x2880 displays side-by-side. The display driver takes these and presents a single 5120x2880 display to the OS (or something like that).

Yes, the TMCON was what I was referring to. The native 5K in macOS is not the same as this 'doubled' display.

(There’s currently an amusing quirk on my 2019 iMac with the official Apple/AMD Boot Camp drivers: if I have Night Light turned on and launch a game at 2560x1440, then alt-tab back to my desktop at 5120x2880, the left half of the display will have the Night Light applied and the right half will not. Fortunately, this is quickly remedied by toggling Night Light off and back on.)

I have seen that many a time. My 2014 iMac does not support 5K on Windows, even though macOS is native 5K. 4K in Windows is plenty for my use. 😉

Loner T

Level 9

59,536 points

Sep 1, 2020 9:10 PM in response to Volkswagen04

Volkswagen04 wrote:

Vendor: AMD (0x1002)

Device ID: 0x7319

The drivers provided by BC Assistant support these new GPUs. However, they may not be the latest and may not match bootcampdrivers.com.

Sep 2, 2020 5:28 AM in response to JamesFMann

Have you tried putting the SSD into another Mac and installing the bootcamp on there!?

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2020 iMac boot camp