no boot devices

Laptop model: Acer Predator PH317-55 CPU: Intel i9 11 Gen GPU: 3070 RAM: 24GB forgot where it starts but heres the issue: my laptop lags when i play game(valo, dota, space engineers, etc) Before this issue started, the laptop ran games smoothly, no problems at all. i start the game, it...

Should I get a 29" ultrawide or a 27" 16:9? Which is these is better for gaming? The 27" is about $100 cheaper than the ultrawide. I am currently using a 21.5". I have looked at the difference in size on displaywars.com but I can't decide which one to get.