Lag pc in maps

Hello all,
I'm playing a minions build and everytime i spawn/despawn them i got a little lag/freeze (sometimes bigger)
And im lagging when there is too much mobs in the area.

I have a good gpu (6750XT) but not so good cpu (ryzen 5600) and 16gb.

Can all these lags be from my cpu being not good or can it be something else?

Any answer or suggestions will help me hard to know if i need to upgrade my pc or else, thank's!