I would suggest that the first thing to do is by hearing protectors.

Haha, well we have the
replacement fans ready to install. And these will be in a server room kept nice and chilly.
which replacement fans did you choose to use? I would appreciate a link if you have it. Thanks.
I
bought the Delta AFB1212SHE units in bulk. Also have the Noctura Fans but will test and send back if the Deltas cut it.
Strato
Re deltas-it wasn't that deal phil was talking about? because if it was, these fans (I bought a lot of 5) have some weird connector which does not seem to readily fit the 4 male pins on the miner.
Did you try these fans already?
Mine came and the connectors are funky shape connectors annoying as shit.
I will have to splice them to some other pwm plugs.
I will use this to splice
http://www.mcmelectronics.com/product/27-5985 to some standard pwm