Question Is it worth buying 140Hz monitor?

That is debatable it depends on what games you play because your graphics card can barely pull 60 fps on high end games.
Complete rubbish. It can easily do 60 fps @ 1080p if you don't choose max settings in the few games it can't hold 60fps. It will do much more with a few compromises on settings.

A 144Hz 1080p would pair nicely with this system. It may not be top end but definitely workable and enjoyable.
 

The_tech_guy

Commendable
Apr 1, 2017
71
1
1,545
If you can run most games you play steadily around 144 fps then yes definetly get it. I would recommend the MSI-MAG271c it is 144hz 1ms 1080p 27" curved for $270; You might get a dead pixel though.
 

ahmediqbal1

Commendable
Mar 4, 2018
23
0
1,510
I just wanna play new games like the ones coming out like Apex Legends, DOOM Eternal,Skull and Bones etc
I also just build this pc like a week ago so I really don't wanna spend unnecessary money.