144hz gaming

Acer Predator XB273KV3bmiiprx - UM.HX3EE.319 Hey All, I am planning to purchase the above monitor for 4k 144hz gaming for my pc with RTX4090. Question is - since gsync compatibility isnt listed for this monitor will it work flawlessly with any game if i want to run them at 4k 144hz with HDR...

im asking because im playing apex with my i5 3470 8gb ram gtx 960 not bad, can live with that average 80 fps but should i get a 144hz monitor? some say if your fps doesnt even reach 140, its a waste of money, whats your opinion