5. KnCMiner Neptune

The KnCMiner Neptune is quite possibly the grand daddy of all Bitcoin mining machines. The Neptune is basically four modular 20nm ASIC boards, designed so that the machine will continue mining even if one (or more) of the boards fails. The Neptune follows up from their previous miner, the Jupiter, which was built on a 28nm process.

The Neptune has a minimum hashing speed of 3TH/s, which translates to about 1.66 Bitcoins a day. This is a vast improvement on the Jupiter, which was only able to mine 0.6 Bitcoins a day. KnCMiner also mention that they have the right to increase the speeds as it nears shipment, so the Neptune might end up being even faster once it gets into miners’ hands.
The KnCMiner Neptune is currently available for pre-order, and is scheduled to begin shipping in Q1/Q2 of 2014, limited to 1200 units.
Price: $12,995