Re: Official FutureBit Apollo BTC Software/Image and Support thread

Quote from: MrMik on Today at 10:25:23 PM

Code:

-fan_temp_low <x> Set board temp at which fan speed should be the lowest (default: 50)
-fan_temp_hi <x> Set board temp at which fan speed should be the highest (default: 80)
-fan_pwm_low <x> Fan PWM if temperature <= fan_temp_low (default: 1)
-fan_pwm_hi <x> Fan PWM if temperature => fan_temp_hi (default: 100)

when I make the assumption that (default: 1) means that the stock ASIC fan lowest speed is already turned down to the minimum speed that PWM will allow?

No, first of all, these parameters allow you to change the default values (which are written at the end of each line) like so:

Code:

./apollo-miner -fan_temp_low 1337 <rest of parameters>

Secondly, the default value of 1 means that the miner will set the fan speed to 1%, when the temperature is below the default 50°C fan_temp_low.

Quote from: MrMik on Today at 10:25:23 PM

In other words, the stock miner fan will run at 1800rpm no matter how much additional cooling I apply and no matter what software setting changes are made?

No; you could basically turn off the fan completely by setting these parameters for instance. This should set the fan to 1% speed regardless of temperature.

Code:

./apollo-miner -fan_pwm_low 1 -fan_pwm_hi 1 <rest of parameters>

Here is my understanding of those 4 parameters. They basically set a 2-point fan curve. I used the default values as specified above.