CPU Problem!! help needed

[frreddie_7]

When Im playing Rainbow six siege I have big problems with stuttering and fps with the intel i5 4670k, but if I change to my amd fx 6300 with another motherboard that performs better and more fps and no stuttering. But when I play like gta 5 I have more fps with the i5 but still stuttering, when I play gta 5 with the amd and other motherboard i have low fps and not much stuttering in gta. In statitics the i5 is very much better. but doesnt feel like it. What should I do? is there something wrong with the i5? what should i do? keep the amd or is there a way to make the i5 better?

 

[clutchc]

Same exact settings in both machines? Same gfx card? Which gfx card?