You can adjust the fan speeds by editing the file /config/bmminer.conf and adding these lines:
"bitmain-fan-ctrl" : true,
"bitmain-fan-pwm" : "50"
That adjusts it to 50 percent the default speed
Here is the whole bracket in my current config:
}
]
,
"api-listen" : true,
"api-network" : true,
"api-groups" : "A:stats:pools:devs:summary:version",
"api-allow" : "A:0/0,W:*",
"bitmain-use-vil" : true,
"bitmain-freq" : "_ant_voltage=0706",
"bitmain-voltage" : "0706",
"multi-version" : "1",
"bitmain-fan-ctrl" : true,
"bitmain-fan-pwm" : "50"
}
"bitmain-fan-ctrl" : true,
"bitmain-fan-pwm" : "50"
That adjusts it to 50 percent the default speed
Here is the whole bracket in my current config:
}
]
,
"api-listen" : true,
"api-network" : true,
"api-groups" : "A:stats:pools:devs:summary:version",
"api-allow" : "A:0/0,W:*",
"bitmain-use-vil" : true,
"bitmain-freq" : "_ant_voltage=0706",
"bitmain-voltage" : "0706",
"multi-version" : "1",
"bitmain-fan-ctrl" : true,
"bitmain-fan-pwm" : "50"
}
My only concern with this, is any potential reason Bitmain shipped them without PWM control enabled. Its clear that there shouldnt be a need for this volume of air when dissipating 330W, but Id be curious to see if the rejected share rate gets higher as the temperatures creep closer to 70+
(I dont think BMMiner is reading HW errors in the traditional sense in this Tensority build.)
The miner seems overengineered.
Has anyone tried pushing the ASICs past 750 yet?
(The default config shows bitmain-freq" : "750" in bmminer.conf.factory)
Either theres headroom both ways, or the blocks on these ASICs start to bug out at higher frequencies/temperatures.
Whos willing to figure out?
PS - Anyone else get shipping confirmation for batch 2? Seems early...
I have tried to change frequency in bmminer.conf and bmminer.conf.factory but it stays at 750.
Unfortunately we know nothing about this version of BMMiner and Bitmain has yet to publish the source used in this firmware.
I'd be curious to know if the parameters work when passed to BMMiner directly.
PS the running cgminer, copy the launch syntax, kill the process, and then launch the miner from the CLI using the fan, fan PWM, and freq flags in line. Can't hurt to try.
I can archive the filesystem and host the gzip if anyone's interested in poking around.