VAM VAM Glitch : strange black lines on scene since update GC

[dark bob]

Hi,

I just upgrade my graphic card from 1070 to 4070.
I put the VAM parameters on ultra. It works fine but I have a strange glitch: some black lines that keep popup randomly on most of the scenes then disappear almost immediately.

Do you any idea?

 

[JoGio]

Congrats on the big upgrade! Make sure your graphics driver is up to date to eliminate that as a variable.

 

[dark bob]

I did reinstall the drivers but still :s