Question cpu always on %100 usage

Apr 3, 2020
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built a new desktop gaming pc today some new parts some not I noticed my CPU was always on %100 usage when I boot my pc or do anything and my CPU fan sounds like a plane to the point it scares my dogs. I have the i7.7700 with a stock cooler master CPU cooler never had any issues before. as well only one ram slot will work.

any fixes thank you or suggestions.

CPU i7.7700 used

GPU RTX 2070 new

Asus z207l new

power supply be quit 650-watt bronze modular new

ram corsair 3200hz 33gb ram