Bitcoin mining FreeNAS

Rockminer R-BoxIn this post I’ll be sharing my recent experience mining Bitcoins with the . The R-Box is a 32Gh/s Bitcoin miner based on ASICMiner’s 40nm BE200 ASIC chip. This mining board utilizes 4 of the BE200 ASIC chips which are the 3rd generation of ASICs developed by ASICMiner and manufactured by TSMC.

R-Box Hardware Specs

ASIC Technology: Four ASICMiner Generation 3 40nm BE200 chips

Hash Rate: 32Gh/s+ (overclockable)

Rockminer R-Box - UnboxedPower Draw: 40 Watts (50+ watts if overclocked)

Power Connector: 2.5mm DC barrel jack

Cooling: Air cooled with built in Fan

Size: 3.54″ wide x 3.54″ long x 2.75″ high

Unboxing the R-Box

The R-Box comes packed in a simple white box with the Bitcoin logo on top. The ASIC is well protected inside with foam padding on the top and bottom.

The R-Box miner itself is quite small measuring at only 3.5″w x 3.5″l x 2.75″h. The board which holds the ASICs is sandwiched in between two heatsinks with a large fan on top.Rockminer R-Box - 2.5mm barrel power pigtail mount several of these miners in a small space.

On the back is a 2.5mm DC power connector and a mini USB port. No documentation is included but Rockminer does provide a on their website.

Included with the R-Box is a short micro USB cable for connecting the miner to a computer, and a 2.5mm barrel power connector pigtail. The R-Box doesn’t include an AC adapter which casual miners might find somewhat annoying.

Rockminer R-Box - MiningOptions for Powering the R-Box Miner

If you happen to have a 12 volt power supply lying around that can supply at least 6 amps you can cut the end of and solder on the pigtail included with the miner.

It’s perfectly fine to use a power adapter that supplies more than 6 amps since the miner will only draw the power it needs but it must supply exactly 12 volts DC.

Alternatively you could purchase an which allows several pigtails to be connected to a standard ATX power supply. If you intend to run multiple R-Box miners then a breakout board, or other custom solution might be the best option.

Another method for connecting the miners to an ATX power supply is to use a . If you do use this method you will still need to wire up a switch, or short the power on pins of the ATX PSU connector.

Initially I attempted to use a 12V 3 amp power supply but it simply didn’t provide enough current to power the miner. When using the lower amperage supply the unit would power on and spin the fan but it would lose USB connectivity as soon as I launched CGminer.

R-Box CGMiner R-Box Overclocked R-Box Horizontal

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