fan basically is autotune.


the best you can do for silence is -2 for voltage offset  and 10 for fan ----- this burns less power and hashes a little lower and is not quite as loud.



this is a medium loud miner.


If you want to lower the sound add this

http://www.homedepot.com/p/10-in-x-25-ft-Insulated-Flexible-Duct-R6-Silver-Jacket-F6IFD10X300/100142376


                                          ___________________
psu wires etc >>>>>>>>minerfan>>>
                                         ____________________ 2nd fan optional                the duct can direct the air where you want.  you can make 4 of these six feet long.

If you want to leave it longer you may need a second fan