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Question Weird sound from cpu/cooler

Jul 10, 2020
Hi there.

I just bought a used Gigabyte GA x 99 Gaming 5 motherboard with an i7 processor with Corsair H105 cooling (water cooler). However, I noticed a strange crackling sound from the area around the CPU and cooler. The sound appears gradually when the computer has been running for 30-60 min. It gets worse when playing games that requires a little from the CPU. I have been checking the temperature which seems to be perfectly fine despite the sound. I am concerned that something is wrong with the cooler. You can hear the sound here:
https://www.dropbox.com/s/8ocflcbwowy0pe2/Falstersgade 2.m4a?dl=0