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Journeyman III
Journeyman III

Ryzen 5 2400G incompatible with dedicated GPU?

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CPU: Ryzen 5 2400G

MB: MSI KRAIT GAMING x370

GPU: NVidia GTX 1080 Ti

OS: Windows 10 Pro 64-bit

Started with BIOS primary GFX set to Integrated.

At first installation of Windows, the CPU and GPU were both using Basic Microsoft Display Adapter but GPU showed as deactivated/problem state in Windows.

Radeon driver installed successfully, GPU remained in deactivated/problem state.

NVidia driver installed successfully, GPU remained in deactivated/problem state.

Switched primary GFX in BIOS to GPU, then both CPU and GPU show as deactivated/problem state.

Any ideas?

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Journeyman III
Journeyman III

Re: Ryzen 5 2400G incompatible with dedicated GPU?

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Ryzen APUs 2400G and 2200G doesn't support dual graphics as all of 7th generation AMD APUs

you can see it here:

https://products.amd.com/en-us/search/APU/AMD-Ryzen%E2%84%A2-Processors/AMD-Ryzen%E2%84%A2-5-Process...

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Esteemed Contributor III

Re: Ryzen 5 2400G incompatible with dedicated GPU?

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AMD and nVidia cards are generally incompatible with each other. Also, why did you buy a lower end APU for 1080 Ti?

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Journeyman III
Journeyman III

Re: Ryzen 5 2400G incompatible with dedicated GPU?

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The internet seems to think that AMD and NVidia cards can coexist in one machine.  There are crypto miners that do it.

The reason I bought this CPU was that I wanted integrated graphics for a permanent primary video connection while I experiment with various GPUs.

This would have worked just fine on any Intel i3/5/7 chip but I made the decision to support Team Red (for the first time in years) out of principle because I'm sick of Intel's unethical and corrupt business practices and I don't want to give them another dime.

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Journeyman III
Journeyman III

Re: Ryzen 5 2400G incompatible with dedicated GPU?

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Ryzen APUs 2400G and 2200G doesn't support dual graphics as all of 7th generation AMD APUs

you can see it here:

https://products.amd.com/en-us/search/APU/AMD-Ryzen%E2%84%A2-Processors/AMD-Ryzen%E2%84%A2-5-Process...

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Journeyman III
Journeyman III

Re: Ryzen 5 2400G incompatible with dedicated GPU?

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Ah.  I had assumed it would work the same as Intel integrated graphics, which was my motivation for choosing it over a regular Ryzen.  Oh well.

I moved the 2400G to a different motherboard and reinstalled Windows and the dedicated GPU now works.  But as expected, the 2400G graphics are disabled.

Thanks for the info!

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Big Boss
Big Boss

Re: Ryzen 5 2400G incompatible with dedicated GPU?

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Generally the BIOS should disable the integrated graphics when a PCI Express graphics card is installed but many do not do that which leads to all kinds of problems.

My old i3-2100 has integrated graphics and when I finally got a more recent BIOS installed I was able to use a video card for the machine that did not cause problems with windows 10

I have been using windows 10 since it was an early preview.

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Journeyman III
Journeyman III

Re: Ryzen 5 2400G incompatible with dedicated GPU?

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Maybe it was like that in the 2xxx series but my i5-4460 graphics worked fine alongside dedicated GPUs.  2 outputs from the integrated and 4 from the dedicated worked simultaneously.

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Big Boss
Big Boss

Re: Ryzen 5 2400G incompatible with dedicated GPU?

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I suspect the BIOS people will eventually get around to it. I recall it took Asus more than 2 years to fix all the problems. Some of the BIOS updates even forced me to reinstall windows a few times.

When the I3-2100 box with upgraded with proper UEFI it finally worked with secure boot etc.

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