When I received my A6, I was surprised at how loud its fan was. I was expecting a quiet miner, not something that was almost as loud as an S5. I replaced the fan with a Sanyo Denki Ace fan and what a difference. I understand why people like philipma replaced their fans with the Sanyo. Do yourself a favor, if you have not replaced your fan, please get a Sanyo fan. I am a fan of Sanyo fan.
I never really had that big of issue with sound with mine. I ran 1 in my room for testing at first. But mine I would say was quieter then my S5. My S5 I did not like in my room.
But fan changing... void's warranty. So I would make sure your out of warranty before doing this. And if you get BlockC they do a good job with stickers to show if it's been open or not.
you do not need to open the case to change the fan.
I would say it is impossible to tell you put in a sanyo denki ace fan for the stock version 2 fan.
But as always swapping it is at your own risk.
I cracked open the case on 1 avalon6 due to the blade I burnt up with over volt. That no longer is under warranty.
I have the burnt one which is repaired it was nov 24 out of warranty.
I also have a second one from nov 24 so dec jan feb. over 90 days that one is out of warranty.
I have 1 from markaz it was a nov model out of warranty.
I have 1 from 64demsions it was a nov model out of warranty.
I have the two from the group buys in jan and feb.