I3 6100 and GTX 1050 2GB Game Stutter

Apr 18, 2018
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Hey,
So I have a PC Build which was built for gaming.
I play quite a lot of games but we'll can't acctually play them
On youtube, you tubers show that it can run fine.
But when I play something like gta5 I stutter like crazy.
But on youtube videos that I have seen show that it plays well!

My Specs:
I3 6100
GTX 1050 2GB
8gb - Single Channel
Msi H110M PRO VD Mobo

Should I buy a i5 6400?

Why can't I play my games properly? Someone please help!