6600XT- Z790-UD-AX - BlackScreen Issue

[iankitme]

I have this strange issue, When it boots right after the apple logo i get black screen for like 30 seconds then login screen appears then after entering the password i get again 30 second black screen. 
Screen is connected via displayPort
MSI MAG342CQR 3440 x 1440 - 144Hz 
Intel(R) Core(TM) i7-14700
GigaByte z790-ud-ax mb
As Rock 6600xt gfx
boot args: `agdpmod=pikera alcid=11 -wegnoigpu watchdog=0 -ctrsmt dk.e1000=0 e1000=0 npci=0x2000 revpatch=auto,sbvmm,asset`

also i have disabled the intel gpu from the bios. 

any guide/help would be greatly appreciated. thanks.

Send me iMac-Pro.zip

[MaLd0n]

EFI.zip

-Bios/UEFI in full default settings, just disable CSM and Secure Boot if need
-Last Bios/UEFI Version
-Delete old EFI folder and paste new. Don't use merge files
-Don't use Drag and Drop into EFI partition. Use Copy/Paste instead
-Reset NVRAM one time - with OpenCore use entry "Reset Nvram" / with Clover use F11 key on boot screen

[iankitme]

Thank you for your reply, Unfortunately, it's same. Does it has to do with the pcie slots? it's on the pcie slot5? also i had to disable the the igpu after reseting the bios or else it look 1 minute. 

[MaLd0n]

Use on first slot x16

[iankitme]

I tried that but still no luck! But i guess i have narrowed it down a bit.
Now if i set my monitor resolution to 3440 x 1440@60Hz  then the second time black screen thing is gone (after login i will need to change it back to 144) so that doesn't make any sense. but the first time after the apple logo the black screen appears so do you have any clue about this thing?