Blackscreen - Opencore 0.78 - I7 11700K - MSI Z490A - PRO - MSI RX5700 XT Gaming X

Hi Guys,
I tried to switch my vega 64 to an msi 5700xt Gaming X
I'm stuck , I get a black screen after ioconsoleusers gioscreenlockstate 3 .
I tried as the Dortania guide says :
- SMBIOS MacPro7,1
- agdpmod=ignore / pikera
- Added the kernel patch
- Added the Aty,Rom#

I don't know what to try next ..
Thanks a lot