Fortnite jerky because of second monitor?

I assembled a PC a week ago, and I have to say he's really awesome. Now the following problem arises: As soon as I start a program like e. Streamlabs on my 2nd monitor (My TV [60hz / Full HD]), Fortnite on my first monitor (144hz / Full HD) begins to jerk. The FPS remain the same (about 200-240 fps), only it looks like the whole game with no more than 60 run. Everything looks smooth in the stream, but it still "jerks" a bit. Even if only Chrome is on the 2nd monitor. I would like to know why that is and how to fix it…

PC data:

AMD Ryzen 7 2700X / AMD Vega 56 (from ASUS) / 480 GB SSD from Kingston and 2 TB HDD from SeaGate / 16 GB DDR4)

Faith is in the working memory

If you use two monitors with different hertz then something happens

Ms. Stiff

Hmm. The is never full, and runs to 3000 mhz. (16GB ddr4)

OK…

Really, synonymous have two monitors with different hz number and never jerk

Ok then it can't be that should be enough. Just try to make the 2nd monitor to the onboard graka

Are these also 144hz and 60hz or are they closer to each other, e.g. 60hz and 72hz?

Right… Let's see what happens

144hz and 60hz

Ok, what do I have to do if he's in the mainboard? Because he tells me he has no signal…

The 2700x does not even have an onboard GPU

Just see that the "AMD Ryzen 7 2700X" has no onboard

XD you can't remember for everyone who has spex

Hmm… What now?

It sounds like you're playing at 30 fps, but the game says 240

But now it's not that hard because only all Ryzen processors with G or GE have a GPU at the end

I'm the Intel type, AMD is not so informed

But how can that be that it seems to me like I have 60 if I have a window on full screen my 2nd monitor… My PC is not bad, right?

No, I think it's because this is not a real monitor, but a TV. They usually have a different technique

ALso can't be fixed? When my old pc went…