Antminer S3 Fan Speed

[ragewiththemachines]

Happy New Year All.

Despite living in a cold room here in England my anminer is insistent of mostly spinning the fans at 1680rpm. Temps are fine, 40/38 never higher. Frequency is kept stock at 225 but the noise is so loud from the fans. Is there a way to spin them down to perhaps 1260ish - it seems possible as they perhaps do this maybe briefly one an hour. I thought about maybe underclocking the unit? Played around in the terminal but couldnt find and fan settings etc.

Any bright ideas?

 

[philipma1957]

Happy New Year All.

Despite living in a cold room here in England my anminer is insistent of mostly spinning the fans at 1680rpm. Temps are fine, 40/38 never higher. Frequency is kept stock at 225 but the noise is so loud from the fans. Is there a way to spin them down to perhaps 1260ish - it seems possible as they perhaps do this maybe briefly one an hour. I thought about maybe underclocking the unit? Played around in the terminal but couldnt find and fan settings etc.

Any bright ideas?

 

http://www.directron.com/zmmc1.html?gsear=1  connect this to your psu  then connect it to your fans it should run the fans at 5 voltt


more info here

https://bitcointalk.org/index.php?topic=907219.msg10004920#msg10004920

[SargeR33]

If you're familiar with electronics and you want to resolve this fast, you can use a multimeter to read the voltages on the molex cable from the PSU then unplug the fan from its current plug and bridge it to run at 5v. It will bring speed down.

Mine are operating at around 45c in 30c ambient and running at 2200rpm. Even on a cool night, they still spin at the same speed.