Question Electric buzz sound near to CPU and in rear i/o audio panel.

Jan 5, 2020
can someone help me resolve my problem?
I have problem with buzzing in rear i/o audio panel. If I connect my headphones to front audio out, there are NO buzzing ( interferences ) to be heard. Alsto When i'm close to my case i hear weird electrical buzz coming from inside my PC. . The electrical buzz is somewhere near the cpu. The amount of buzz seems to be directly correlated with the CPU usage. Because when i use FurMark and processor works on 100%. The buzzing is gone. I'm apologize for my english. And Thank you for any advice. :)

My PC build:
CPU: Intel Core i7-9700K 3.6 GHz
CPU Cooler: Be quiet! DARK ROCK 4
Motherboard: GIGABYTE Z390 GAMING X
RAM: HyperX 16GB KIT DDR4 3200MHz CL16
Power Supply: Corsair RM750x (2018)
Graphic card: GIGABYTE GeForce RTX 2070 SUPER WINDFORCE OC 3X 8G
Case: SilentiumPC Signum SG1 TG