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Core i9-12900K on-chip graphics not available

Hakans
Beginner
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I have just replaced my ASUS ROG Strix 8360-F Gaming motherboard with an ASUS Gaming Z790-PLUS WIFI motherboard. On the old MB I had three displays, two connected to the MB and one to an ASUS GeForce GT 790 graphics card. All running perfectly.

I moved the displays and the graphics card to the new MB, but now only the display connected to the graphics card works.

I downloaded Intel Graphics Driver Installer gft_win_101.6325_101.6252.exe, but it could not install the driver: error 8. The log file says ERROR: Could not find driver file. Also I do not find where in the BIOS I could enable CPU Graphics as primary display.

The manual of the new MB states it supports 4K@60Hz, and "Graphics specifications may vary between CPU types. I ordered the 12900K version as it is specified to include CPU graphics.

Anyone who has any clue, out there?

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n_scott_pearson
Super User
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So switch to UEFI Boot. This explains how to use the MBR2GPT utility to do so: How to convert MBR to GPT drive to switch BIOS to UEFI on Windows 10.

Hope this helps,

...S

 

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n_scott_pearson
Super User
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By default, most BIOS implementations, upon detecting the presence of a discrete graphics card (dGFX), will disable the integrated graphics engine (iGFX).
If you want both the dGFX and iGFX engines running, you need to go into BIOS Setup and configure the iGFX to always be enabled. How you do this varies from one BIOS Setup implementation to another.
Hope this helps,
...S

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Hakans
Beginner
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Thanks for your reply Scott.

I am still struggling with this and now suspect there is something wrong with the BIOS.

It seems to not allow using Legacy boot with both CPU and external graphics.

 I only have Legacy boot on my C:, no UEFI, and there seems the problem reside.

 

I fiddled around with the BIOS settings and was able to get to the state where all three screens were active, but then booting stops in BIOS mode, and it is not possible to enable CRM.

 

I experimented by removing the external graphics card and then I can not invoke the CSM boot mode, thus I can not boot.

When I reinserted the graphics card and rebooted I could not set Primary Display = CPU graphics, only Auto/PEG Slot/PCiE is available.

 

So I notice that the available BIOS options vary depending on the presence of the graphics card or not!

 

So, at this point I conclude that the CPU is doing its job, but the BIOS has a bug which does not allow me to set to boot in Legacy mode with both CPU and external graphics. Could it be so?

 

BR

/Håkan

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MUC
Valued Contributor III
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Please check this in the BIOS:

 

MUC_0-1734727837002.png

 

MUC_1-1734727930801.png

 

 

ASUS Intel 700 Series BIOS Manual

 

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Hakans
Beginner
359 Views

Thanks Scott and MUC, but I am still in trouble.

I am still struggling with this and now suspect there is something wrong with the BIOS.
It seems to not allow using Legacy boot with both CPU and external graphics.
I only have Legacy boot on my C:, no UEFI, and there seems the problem reside.

I fiddled around with the BIOS settings you refer to and was able to get to the state where all three screens were active, but then booting stops in BIOS mode, I notice the BIOS indicates UEFI, and it is not possible to enable CRM.

I experimented by removing the external graphics card but then I can not invoke the CSM boot mode, thus I can not boot.
When I reinserted the graphics card and rebooted I could not set Primary Display = CPU graphics, that option was not there only Auto/PEG Slot/PCiE is available.

So I notice that the available BIOS options depend on the presence of the graphics card or not!

So, at this point I conclude that the CPU is doing its job, but the BIOS has a bug which does not allow me to set to boot in Legacy mode with both CPU and external graphics. Could it be so?

BR
/Håkan

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n_scott_pearson
Super User
349 Views

So switch to UEFI Boot. This explains how to use the MBR2GPT utility to do so: How to convert MBR to GPT drive to switch BIOS to UEFI on Windows 10.

Hope this helps,

...S

 

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Hakans
Beginner
287 Views

Yes, converting from Legacy boot to UEFI boot using MBR2GPT.exe helped. This was my original plan but first I intended to get all screens working with Legacy MBR boot. Obviously this was not possible, maybe due to a bug in the BIOS! Converting to UEFI circumvented the problem!

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