Is this 165 hz 1080p monitor enough for fortnite gta and fifa?

GIGABYTE G27FC gaming monitor, black, 165 Hz, FullHD, 1 ms, curved

Even an old CRT monitor is enough for that.

But play on PC

That does not matter.

What kind of reason is that?

How do you think the monitor is enough? The monitor does not determine how the game runs and is not a component and not a high-performance one, but rather a consuming one

A screen can't be "enough" because it has absolutely nothing to do with the performance of the games. The screen only decides how good it looks to you. And your chosen monitor should be good enough for today's image resolutions.

Sure I have an rx 580 8gb and a ryzen 5 3600 processor

But I doubt that you get 165 Hrz in gta. I would also advise you to get a 144 hrz monitor because it is cheaper and you don't notice the difference