Cpu/mobo noise + video

Aug 22, 2015
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4,510
I was trying to OC my new 8700k. everything was ok but then strange pitched noise started (with intervals) from cpu area.
Noise seems to be loudest when i run "intel Extreemet utility" Benchmark. Note that there was no noise till 5th or 6th attempt. Bios settings reset did not help. No noise while in cinebench. a lesser one while stress test. and loudest when benchmarking. noise isnt coming from Psu nor x62 nzxt.
heres videoi recorded: https://www.youtube.com/watch?v=kY5Nb3egD9E&feature=youtu.be
mobo: asus gaming z370-h
psu: seasonic 650w plat
 
Capacitors and other SS elements don't have anything to make any noise, only some coils but that's a very high pitched sound, almost at ultrasound frequencies, "coil whine". Occasionally, some interference between fans can cause some apparently pulsating sound, you could check for that by shutting down or altering speeds of fans.
 

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