Chosen Solution

Hello guys. I have a problem with my Mac Pro, a few days ago it is having distortions in the production of videos or simply accessing in the browser. I already changed to a video card identical to what I have, but it did not help much. They know if there is a possible solution. Thank you in advance for your help.

Start up in Safe Mode by holding down the Shift key on start up and see if the problem persists.