SMART Miner Rack Mount 20TH/s Bitcoin Miner |

While the box and unit were not damaged, the Beagle Bone Black had jostled partially off the pins causing it not to boot and popping a blade cable loose as well. Once these were secured the S4 powered on with no issues.

Bitcoin Mining Calculator and Profitability Calculator

The LCD tells you the IP address that the miner is on so you can easily navigate to the control panel and add your pool settings and password. We highly suggest that you change it to something secure. The control panel is the same as you are used to with Bitmain miners. Very feature rich and easy to use.

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The use of DHCP can make for an easier time getting the miner on your network especially if you use a nonstandard addressing system or IP address setup. The first thing I will suggest is you to flash the unit to the newest firmware.

The new firmware contains the cgminer 4. With the shipped firmware on batch one, you will find that many times the hash rate will not report correctly, and poolside will only show up as less than half or less of the total hash rate. Make sure to set the difficulty to on your pool. Right now BTCGuild works the best. Ghash and eligius work but not up to full speed with the newest firmware. We were not able to get it to work well with P2Pool. NastyPool gave me the best results at roughly 1.

The driver needs to be fixed to allow better compatibility and currently ckolivas of cgminer is working on better cgminer results but is encouraging Bitmain to fix their driver. The Antminer S4 does not ship with a power cable.

Antminer S4 Review

Lesser cables will melt down and can ruin your miner not to mention your fuse box. The S4 also stays much cooler than the Antminer S2 did using a better fan and blade arrangement. Internal blade temps run between 45 to 49 degrees Celsius at an ambient temp of 39c. The firmware driver issue limits which pools you can run on with optimal performance. This issue can cause some issues for those running on P2Pool especially. It is best to run it on BTCGuild right now until the issue is cleared up.