Question Monitor struggle

Feb 14, 2019
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Hi guys

Im about to build my first pc ever (switched from ps4). And these are my specs:

Ryzen 2600
2x8gb vengeance lpx 3000 mhz
B450 carbon pro ac
Pulse rx vega 56 (maybe soon)

So im thinking about to play it on a 1080p 144hz monitor instead of a 1440p since its expensive and ill want to run the game on high fps. I play a lot e-sport like LoL, cs go, pubg, overwatch. I think it will run fine but they said it will be too much for LoL (overkill) for a vega 56. Is it true or can i just run it at high fps since ill mostly play LoL.

Second. I wanted to play it on an ISP 1080p 144hz monitor but seems theres not that much left. So was thinking much between VA and TN. Any help would be appreciated.