https://www.youtube.com/watch?v=p9O-bMyGAFc&ab_channel=Lachesis
My graphics card is an AMD Radeon HD 7900 Series.
Everytime I'm playing a game, I've got these blinking lines that appear on my 2 monitors. They started appearing when I plugged my second monitor in.
My first monitor's refresh rate is 60Hz and its resolution is 1366x768. It was plugged in the DVI port, and I used DVI to VGA adapter.
When I got my second monitor (60Hz/1920x1080), I used the port that used to be the one where my first monitor was plugged in. Therefore, I used a mini display port to plug my first monitor in, through a mini DP to VGA adapter.
I don't know what to do, the internal parameters of my screens are well adjusted, and I don't know how to make these disappear.
Writing this in english made me struggle so much, I'm sorry if something's not understandable.
I really hope someone here can help me, thanks in advance !