hi everyone pleace help me black screeen and screen riple problem

[detroit]

hello my system is gigabyte g31m esl2 rev 2.0 motherboard intel e7400 processor video card hd7950

mac high sierra i installed

my problem is i use vga to hdmi

normally computer starts but stays on black screen
When I do -amd_no_dgpu_accel, I reach the desktop, my video card is recognized, but there are fluctuations on the screen

 

[P1LGRIM]

my problem is i use vga to hdmi

There is no support for VGA.

 

[detroit]

thanks