@D-Naeee1 I'm not totally sure what you're asking in terms of resolution. The FHD monitors can only run at up to 1920x1080, and the QHD monitors' max is 2560x1440. Above that, the only standard resolutions are 3440x1440, which feels very wide, and 3840x2160 (4k), which is hard on a graphics card because of all those extra pixels. (The demands don't increase linearly, but it's still a large extra load.) I will say that my 27" QHD panel only looks grainy if I get a little too close to it and stare; I don't notice it at all in gaming.
All of these monitors would work fine with any computer. The matter of resolution is really about framerates, as in, if you want to play at a 2560x1440 resolution, you probably also want high-enough fps for the game to look smooth. So I usually don't suggest a high-res monitor unless someone's also going to buy a GPU that can handle the load. A 2060 is more than enough, in fact it's overkill. But the only cheaper computers come with a significantly-slower 1650, so the 2060 is the first good upgrade above that.
My gaming PC has an i7-9700K and an RTX 2070 that I'm going to replace with a 3080 ti (when I get around to it), plus 32 GB RAM (totally unnecessary; I've never used more than about 12) and two SSDs for 2.5 TB storage (also overkill, but the 2 TB drive is more than half full and I have more games to download). I built this with the intention of playing much more demanding games than Sims 4, and it's mostly handled things quite well. I really only get low fps when I run a game with Raytracing enabled, for example Control or Shadow of the Tomb Raider, but I've also put off running a couple other games until I upgrade.
This is the kind of computer you build if you want to play the newest games and don't mind spending money but also want to get one system that'll last for a long time. I deliberately built more power into it than I could even use everywhere but the GPU, and that means I can now add almost any new card currently on the market without upgrading anything else. But for someone who's only interested in playing Sims games, it would be a waste of money.
Sims 4 runs at about 170 fps under ideal conditions but shows drops into the 120 range at times. The graphics card isn't running anywhere near max when this happens, and neither is the processor; I'm pretty sure this is just a limitation of the game engine.
