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I have an Antminer u3 running on a raspberry pi using bfgminer. Its currently running at 47GH/s. Does anyone know if is possible to over clock it using BGFminer so that it will run at 55 - 60 GH/s?

if i cant do it using BFGminer is there another mining software i can do it in?

any suggestions would be welcome and would be appreciated:)

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2 Answers 2

Reset to default
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I set up my rasp pi b+ and U3 mining rig using the instructions in this forum post, with screen and cgminer.

The command relevant to over clocking the raspi that I used is the following:

sudo ./cgminer --bmsc-options 115200:0.57 -o POOL -u USERNAME -p PASSWORD --bmsc-voltage 0800 --bmsc-freq 1286

Those last two options (bmsc-voltage and bmsc-freq) are what over clocked the rasp pi. But I think I had to compile cgminer and configure it to include bmsc. Mine typically runs with a hash rate in the high 50's or low 60's, but maybe not quite 62-63 GH/s.

Also, I did try to push the U3 voltage and frequency higher by playing with the settings as detailed in the U3 manual. However, I could never get the U3 to run stably at settings any higher than what I gave above. I'm not sure if it makes a difference, but I'm actually running two U3's on the one rasp pi and cgminer instance.

Update: In the interest of providing a complete answer in one place, here's the full text from the linked forum post:

Run a fresh install of Raspbian using NOOBS, after the install type ifconfig and make a note of the IP address, so that you can remotely SSH into your Pi. Login via PuTTY with the default username/password, then raspi-config if you would like to change the hostname, default password and so on.

Now update the Pi: sudo apt-get update && sudo apt-get upgrade

Install dependencies:

sudo apt-get install libusb-1.0-0-dev libusb-1.0-0 libcurl4-openssl-dev libncurses5-dev libudev-dev screen libtool automake pkg-config libjansson-dev screen

Clone cgminer from here: git clone https://github.com/bitmaintech/cgminer

Install, configure and also enable bmsc options:

cd cgminer

sudo ./autogen.sh

export LIBCURL_CFLAGS=’-I/usr/include/curl’

sudo ./configure --enable-bmsc

sudo make

Test cgminer is working correctly by running the following (input your own pool, username and password):

sudo ./cgminer --bmsc-options 115200:0.57 -o POOL -u USERNAME -p PASSWORD --bmsc-voltage 0800 --bmsc-freq 1286

Type Q to exit cgminer...

Now, add cgminer to start automatically when the Pi is powered on and create a screen session:

sudo nano /etc/rc.local

Remember, Ctrl-X to exit, then type Y and press Enter to save changes. Add this just above exit 0, again enter your own pool, username and password:

cd /home/pi/cgminer

screen -dmS cgminer ./cgminer --bmsc-options 115200:0.57 -o POOL -u USERNAME -p PASSWORD --bmsc-voltage 0800 --bmsc-freq 1286

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  • Thankyou, its now running at around 58gh/s :D
    – blobbymatt
    Jun 25, 2015 at 6:20
  • no problem, glad I could help!
    – jfoo
    Jun 25, 2015 at 6:27
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I have 2 u3 antminers running on a raspberry pi b+ I could not get my u3 any faster until i used minera software,set to cgminer (offical) with command: --au3-volt 830 --au3-freq 250.0 In the settings menu it will run at 62-63 GH/s. you can download it hear http://getminera.com/

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