[SOLVED] How to fix my laptop not using my cpu fully?

Jan 11, 2020
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My computer runs games fine I've got an omen laptop with a 960M 2GB and an I5-6300HQ and I can run most stuff at 60 FPS and have always been but lately when I'm playing a game it goes from 60FPS to 20-15 and my CPU usage goes down to 30% how can I fix this?