Re: BITMAIN Antminer support and OverClocking thread

Quote from: goxed on November 27, 2013, 02:38:14 AM

This thread is for support related discussions of the BITMAIN Antminer S2 hashing device

How to overclock your miner to 400MHz / 205GH/s. My suggestion is to clock them at 375. 400 is a bit too harsh on the voltage regulator.
All clock speeds including 375MHz work on both revision of boards.

The miner will draw 500 - 525Watts at the wall (110V mains) after this setting

A) ssh into your miner

B) edit the following file
/etc/config/asic-freq

C) change timeout to 36, freq_value to '0780', 'chip_freq' to 400.
For miners with build date 2013/11/4

Code:

root@antMiner2:/etc/config# vim asic-freq

package 'cgminer'

config 'asic-freq' 'default'
   #option 'freq_value' '0780' #400M

#option 'freq_value' '4e81' #375M
#option 'chip_freq' '375'
#option 'timeout' '37'

   #option 'freq_value' '4d81' #350M
   #option 'chip_freq' '350'
   option 'timeout' '36'
   #option 'freq_value' '4c81' #325M
   #option 'chip_freq' '325'
   option 'freq_value' '0780' #350M
   option 'chip_freq' '400'
   #option 'freq_value' '0580' #300M
   #option 'chip_freq' '300'
   #option 'freq_value' '0981' #250M
   #option 'chip_freq' '250'
   #option 'freq_value' '4f02' #190M
   #option 'chip_freq' '190'

For miners with build date 2013/11/18

Code:

package 'cgminer'

config 'asic-freq' 'default'
   option 'freq_value' '4f81' #400M
   option 'chip_freq' '400'
   option 'timeout' '35'

   #option 'freq_value' '4e81' #375M
   #option 'chip_freq' '375'
   #option 'timeout' '37'

   #option 'freq_value' '4d81' #350M
   #option 'chip_freq' '350'
   #option 'timeout' '40'

   #option 'freq_value' '4c81' #325M
   #option 'chip_freq' '325'
   #option 'timeout' '40'

   #option 'freq_value' '0b81' #300M
   #option 'chip_freq' '300'
   #option 'timeout' '45'

   #option 'freq_value' '0981' #250M
   #option 'chip_freq' '250'
   #option 'timeout' '55'

   #option 'freq_value' '0781' #200M
   #option 'chip_freq' '200'
   #option 'timeout' '70'

   #option 'freq_value' '4f02' #193M
   #option 'chip_freq' '193'
   #option 'timeout' '70'

How to RESET your OpenWRT card in case of an unresponsive miner

Please follow the steps in the instruction manual provided by BITMAIN below.
https://github.com/AntMiner/AntGen1/blob/master/manual/AntMiner%20FAQ.pdf?raw=true
https://github.com/AntMiner/AntGen1/tree/master/manual

Please donate if it works for you: 1FrW5ka9CRVWdL9EM4Jut9eHWU1a1biyy5

How stable are they? What chance is there that they will die suddenly and I will regret it?