gtx 780 black screen with cursor

[pao13]

Asrock Z490M-ITX/ac

cpu i5 10600k

opencore 0.6.7

gtx 760 -----   to gtx 780

displayport connection 

 

my system work good with gtx760 boot normal

install 780 and boot normal with apple logo after all go to black screen with cursor

seem to boot normal but I don't look something

 

I try to share screen to see what happen but see black

any help please?

 

connect to other dvi ports and my cursor go side like have 2 monitors

Edited March 8, 2021 by pao13