Lags in CPU intensive titles?

Li
1

My buddy has since his PC reset suddenly stutter in games like CS: GO or Minecraft, both relatively processor intensive titles. His equipment:

Intel Core i5 4440 3.1GHz

8GB Kingston DDR3 1600MHz RAM

AMD Radeon RX 570 4GB

be quiet! System Power 9 500W

Ca

CS: GO and Minecraft Vanilla will definitely run smoothly