RAMPAGE 6 EXTREME ENCORE GOP/VBIOS

HI
Here is my system configuration :
R6EE UEFI/BIOS 702 modded (see attachment)
Core i9-10900x
Ram 4x8 8g DDR4 G SKILL F4-4000C18-8GVK
XFX RX 580 8Gb graphics card PCIE-3 on slot PCIE1-3x16
In the BIOS/UEFI there is an information labelled like the following :
"State of GOP/VBIOS : Select a valid GPU"
It seems that my GPU is not recognized.
Is there something to do for that GPU be detected?
The software GPU-Z says that the card is UEFI and working at PCIE3x16
Thanks in advance for your informations
Fran├žois[img]

BIOS702modbyme.jpg

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