4. Black Arrow Prospero X-3

Black Arrow’s Prospero X-3 is powered by 20 Black Arrow Minion ASIC chips built into a 19" rack mount unit. The Minion ASICs are built on a 28nm process and are an in-house design. The Prospero X-3 will also have a built-in LCD display that will show statistics and diagnostics.

The 20 Minion ASIC chips in the Prospero X-3 give it a hash rate of 2TH/s, good for about 1.1 Bitcoins per day as of the time of writing. The Prospero X-3 has been designed with up to 20% under- and overclocks in mind. It also supports the lightweight Stratum mining protocol.
The Prospero X-3 is available for pre-order and is scheduled to be available at the end of February 2014.
Price: $6,999