Fans and performance issues

Nov 4, 2018
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Hello, yesterday I got a new PC. I was really enjoying it and having a long gaming session when suddenly my PC crashed. When I turn It on, only 2 out of 4 fans are working and my performance dropped drastically. Any ideas what could have went wrong or how to fix It.
Pc specs: nvidia 1070, amd ryzen 7 2700x, 16gb ram
Pc case: Chieftic scorpion
Thank you