Ok, so, a while back, Nvidia started supporting AMD Free Sync as well as G Sync so as not to discourage anyone with a Free Sync monitor from buying an Nvidia cards. Might need a Displayport cable. Don't know how it stands now but back when I got my monitor, about 2 years ago maybe, the equivalent AMD Free Sync monitor would cost you about a hundred USD less or more. My point is, you can use either with an Nvidia cards but check specific model compatibility no matter which Sync you go with, do your research. I'm running 1080p at 75Hz on a 34 inch AMD Free Sync monitor on an RTX 2060 Super, Intel i7-10700K and 32GB of 3600Mhz memory. 1080p, but 2560 wide (2,764,800 pixels). In DCS on mostly High settings I'm capping out at 75FPS almost constantly. IL-2 BOX Maxed out is pretty much constantly capped at 75fps, I think the lowest it's ever been is maybe 65 but if it even does it's rare. Sometimes on DCS Supercarrier takeoff it'll get down to 45 if I look back while staged to launch but I'm still running an old version of DCS, 2.5 something (too much to download on satellite) so I'm sure it'll run even better with the latest optimizations I believe DCS has implemented recently. I picked up a couple of Lenovo 19 inch monitors for each side and now I can run triple monitor with the 34" ultrawide in the middle, but when I do that it's a video card crusher. Even if you go 1440p I would HIGHLY, HIGHLY, HUGELY recommend you go for an ultrawide preferably curved if you can but it's not necessary, I get no noticeable edge distortion on anything. They go even wider now but your going to be pushing a massive amount of pixels with anything over ultrawide and it's going to cost $$$$. If you want a deal on something that's not going to kill a graphics card and will look amazing, go with a 2560x1080p 34 inch with as high of a refresh as you can. Otherwise, go for a 3440x1440 and you'll thank me later. Just be aware that's like 4,953,600 pixels so you're gonna want a 3080 ti or better when the prices, IF the prices drop. I'm looking to pick up at least an RTX 3080, probably a ti. I'd love to get a 3090 but the prices are just way too ridiculous right now.
https://www.newegg.com/viewsonic-vp3481a-34-wqhd/p/N82E16824117008?Item=9SIA00Y8331378