Quote from: GenTarkin on August 02, 2014, 06:40:28 PM

Quote from: JakeTri on July 31, 2014, 05:27:17 PM

Quote from: SVK on July 31, 2014, 04:33:59 PM

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Had a look at Cgminer from JakeTri and in Read ME file I can't see any voltage settings Sad

Here is copy and paste with relevant information from ASIC-README file from https://github.com/jaketri/cgminer

Code:

--hfa-options Set hashfast options name:clock@voltage0@voltage1@voltage2@voltage3:clk0:clk1:clk2:clk3

This command allows you to set options for each discrete hashfast device by
its name (if the firmware has naming support, i.e. version 0.3+). Currently
this takes as option the clock speed, 4 voltages and 4 clock offsets (voltage and
clock offset for each of the 4 cores of the ASIC)
e.g.:
--hfa-options "rabbit:650,turtle:550@800,bee:950@905@925@975@985:-100:-50:0:25"

Would set a device named rabbit to clock speed 650 MHz using default voltage, the
one named turtle to 550 MHz using a voltage of 800 mV for all cores and the one
named bee is set with different clock and voltage for each ASIC core as following:
> core 0 at 850 MHz (950 MHZ base clock with -100 MHz clock offset) and voltage of 905mV
> core 1 at 900 MHz (950 MHZ base clock with -50 MHz clock offset) and voltage of 925mV
> core 2 at 950 MHz (950 MHZ base clock with 0 MHz clock offset) and voltage of 975mV
> core 3 at 975 MHz (950 MHZ base clock with 25 MHz clock offset) and voltage of 985mV
Starting the device at a speed where it is most stable will give more reliable
hashrates long term and prevent it interacting with other devices, rather than
depending on the clockdown feature in cgminer.

Note: Setting voltage may cause a board reset and hotplug event on cgminer startup.

Is it possible to run it without voltage modification yet still individual core speed settings? If so, what would be the syntax? Thanks

The new settings are send to device only if voltage values are different from the voltage value stored on the device flash memory.

You can start this cgminer as normal (without any voltage setting) and look to the cgminer info message about current device settings from flash memory. Look for something like this:

Code:

[2014-07-02 10:02:16] HFA0: Device settings (875MHz@930mV,875MHz@930mV,875MHz@930mV,875MHz@930mV)

After that use the voltage values from device and adjust only the core speed settings. This will not modify the device settings from flash storage.