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High pitched noise from CPU area

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Posted · Original PosterOP

Hi, I have problem with noise coming from the area around the cpu (i7-8700K). It's like light coil whine on MB. It's only happening when cpu is idle. I've tried change the cooler (Corsair H115i Pro), turn off the HDDs, fans, pull out the gpu or change PSU but noise is still there. I found some solution when i disable cpu idle state in power management. The noise was gone but cpu usage  and temps went up (like 20 degrees hotter). Did anyone have same issue? I'm really hopeless now. :/


MB: ASRock Z370 Extreme 4

CPU: Intel Core i7-8700K

COOLER: Corsair H115i PRO

RAM: 16GB 3000MHz DDR4

GPU: MSI GTX 1070 Gaming X

PSU: Seasonic Prime Ultra Titanium 650W 

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