PC gaming streaming?

Moin together, my problem is: play on a computer with 2070s, 32GB RAM, i7 9700 monitor Odyssey G9 32: 9 49 inches. The game has worked great so far and now I wanted to stream something on Twitch. I connected a second monitor (Full HD 16: 9) and now the problem arises. I play cod and if I want to start the game now everything collapses and the PC restarts. With a monitor it still works fine. Can someone help me there?

Have you already tried to change the full screen mode to borderless in the start properties of the game?

Yes I have.

I had the problem once and so I fixed it well, good luck for the future

I think your system is overwhelmed with calculating 2 completely different resolutions while you are gambling. You could try using msi afterburner to peg the clock of the graphics card so that it no longer adjusts itself up and down as it suits you. Could provide stability

That is also my train of thought that the graphics card is simply overwhelmed, but does the PC restart immediately?

I can't guarantee anything. For me, the most likely scenario is that brief dropouts occur, which then switch off the graphics card. I can't rule out anything from afar, you have to take action yourself.