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physicsnurd
Journeyman III

Radeon VII fails to boot after installation

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I have an ASRock Fatal1ty X370 GAMING X motherboard and upon installing my Radeon VII the motherboard errors with a d6 (No Console Output devices are found) I have tried a single 8 pin power and an 8+6 pin. Is there some compatibility issue I am not aware of?

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esiotrot
Adept I

Re: Radeon VII fails to boot after installation

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Hi, there are several potential issues.

You will need 2 x 8 Pin connectors to be able to power the card. I believe min PSU is 600w but recommended is 750.

If you have 2 x 8 pin connectors and are still having these issues, are you running any raid arrays?

If so you may be experiencing an enabling of CSM on your motherboard, due to the Radeon's unusual no-UEFI support. Which is the issue I am having. If you have  UEFI reliant boot disk or array, you will be unable to boot using the Radeon VII until they release an update for the VBios. Which I hope is soon.

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goodplay
MVP

Re: Radeon VII fails to boot after installation

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Check your cable to monitor connection(hdmi or displayport ?).

PSU requirement 750W with 2 x 8 pin pcie connectors.

Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, Aorus gen4 7000s 2tb, Nitro+RX6900XT, RM850, Win.10 Pro..
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esiotrot
Adept I

Re: Radeon VII fails to boot after installation

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Hi, there are several potential issues.

You will need 2 x 8 Pin connectors to be able to power the card. I believe min PSU is 600w but recommended is 750.

If you have 2 x 8 pin connectors and are still having these issues, are you running any raid arrays?

If so you may be experiencing an enabling of CSM on your motherboard, due to the Radeon's unusual no-UEFI support. Which is the issue I am having. If you have  UEFI reliant boot disk or array, you will be unable to boot using the Radeon VII until they release an update for the VBios. Which I hope is soon.

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goodplay
MVP

Re: Radeon VII fails to boot after installation

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Radeon VII Lacks UEFI Support

Found this, but needs confirmation if it is the new/fix vbios, amdmatt

https://www.amd.com/en/support/radeonvii-vbios-eula

Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, Aorus gen4 7000s 2tb, Nitro+RX6900XT, RM850, Win.10 Pro..
physicsnurd
Journeyman III

Re: Radeon VII fails to boot after installation

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I am currently booting from a Samsung 970EVO M.2 NVMe SSD. Is it possible this is the problem? If a new vbios is needed, how can I update i if I cannot boot with the card installed?

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physicsnurd
Journeyman III

Re: Radeon VII fails to boot after installation

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Also, I have ordered an 8pin to 2x 8 pin adapter, however, my understanding is the extra two pins between an 8 pin and 6 pin are just 2 extra grounds. It should still boot with an 8pin+6pin, no?

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Matt_AMD
Community Manager
Community Manager

Re: Radeon VII fails to boot after installation

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Please enable CSM mode in your motherboard BIOS and check to see if you can boot the system after making this change. 

esiotrot
Adept I

Re: Radeon VII fails to boot after installation

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Hi Matt & goodplay,

I managed to find the link late last night, after the ASRock bios failed to allow UEFI booting, the link above https://www.amd.com/en/support/radeonvii-vbios-euladoes work however! CSM is disabled and it now boots as UEFI without any issues. (You may want to go as far as to pin that reddit post you made to the top, if you are able.)

Thank you for releasing a fix this quickly and for others in the same boat as me  -use the bios in the link above for a fix I can confirm that it does the trick.

physicsnurd
Journeyman III

Re: Radeon VII fails to boot after installation

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I checked and CSM is enabled on my motherboard. I cannot be certain it was enabled before I started, but I cleared the BIOS settings while I was trying to get the card to work and did not change any settings besides ram speed since and it still did not work. I have a 2x8 pin adapter coming to make sure it is getting all the power, but since the installation guide lists that power options are everything from 1x4pin to 2x8pin and the 1x8pin+1x6pin that I tried, I suspect that might not be the issue.

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Matt_AMD
Community Manager
Community Manager

Re: Radeon VII fails to boot after installation

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Each connection should have its own 6+2PIN or 8PIN connection from the 12v rail.  

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