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HX850 grinding noise after fan speed stabilize


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Hi all,


My HX850 has recently started getting noisier and noisier. It was pretty much silent when I got it (except when it started spinning, but the noise wasn't very noticeable). As of now, the fan will start spinning and after the fan speed seems to stabilize, I'll hear some sort of grinding noise that will last from 1 to 5 seconds and then go away. This will often happen because one of my graphic card will be drawing more power than in general (for instance in games, or watching a youtube video), thus the PSU components will get hot and the fan will start spinning to dissipate heat.


The noise can be hear with the following file: https://mega.co.nz/#!tp0wTSAY!SIvjjVffztEgPXmmls8Oshzoyhd7efEkYpxxJcTcqDs


I've already followed the suggested steps in http://forum.corsair.com/v3/showthread.php?t=85166 (disabled C1E, IEST was already disabled) without much success.


The PSU was bought approximately 3-4 months ago and before I ask for an RMA, I was wondering if there were any last steps I should attempt?



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