I have the same res and can't hear it above the case fans in my system (undervolted 1200 rpm fans running 900 rpm 120mm fans). When I am bleeding, working on the loop and have my case open and the res hanging outside the case I can JUST barely hear mine but it is no louder than the pump. Not sure how noisy yours is but if you can hear it inside your case it means one of two things. Either there is a problem or your case is SO quiet that the sound of the reservoir is the loudest thing in your case. What case are you running and how many fans (specs please)?
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