PC Graphics

[bjsk90]

Okay, so I have the aforementioned CPU and GPU, and I'm running it on an Asus Prime B650M-A AX6 motherboard. Running on Windows 10 currently, but getting ready to upgrade to Windows 11 soon, so I'm making modifications to the BIOS settings to get it compatible with Windows 11. I enabled the TPM 2.0 module on the processor, and then I enabled Secure Boot feature too.

Prior to enabling Secure Boot, the onboard 740M IGPU would not work, it wouldn't even show up as an available option, and it would only work through the RX 480 DGPU. After enabling Secure Boot, it would only boot up using the IGPU, and not with the DGPU. So I couldn't see the BIOS screen if the HDMI cable was attached to the DGPU. But after Windows completed initialization, then Windows would work through the DGPU again, but the BIOS boot screen would still need the IGPU. Similarly, if the HDMI were attached to the IGPU, then I could see the BIOS screen, but then Windows would not work on the IGPU, so I'd would have to move the cable on the DGPU again. However, if I physically removed the RX 480 DGPU, then everything works through the IGPU, including BIOS and Windows.

Can anyone tell me what the solution is here to get it to completely work through the RX 480 while Secure Boot is enabled?

[FunkZ]

In the BIOS force the graphics to PCIe first or disable the IGP altogether.

[bjsk90]

Thanks for the response, the I do have the PCIe as the primary graphics, but I can't see anywhere in the BIOS where I can disable the IGPU? This is a particularly weirdly setup BIOS, things don't seem logical to me where things are. I suppose people always say that when they change their motherboards.

[FunkZ]

I never liked ASUS boards.

https://www.asus.com/motherboards-components/motherboards/prime/prime-b650m-a-ax6/helpdesk_manual?mo...

On my Gigabyte board, it's under Settings, IO Ports, Integrated Graphics, Disabled.

[bjsk90 · Accepted solution]

Thanks for the link to the motherboard manual, I already had it in printed form, but it's always great to have a PDF of it too. But unfortunately, it's useless for anything even slightly hard and technical.

Okay, so I'm answering my own question. I figured out what to do, and I'll just put the solution on here in case somebody else has a similar problem in the future; it's only guaranteed to work with my Asus motherboard, the Prime B650M-A AX6, but it might inspire you to know where to look in your own motherboard. You can follow these steps:

1. Enter bios screen (F2 or del)
2. Enter Advanced Mode (F7)
3. Enter My Favorites menu
4. Enter CSM (Compatibility Support Module) menu
5. Set Launch CSM to enabled
6. Set Boot Device Control to UEFI and Legacy OPROM
7. Save changes and exit