Review: ASICMiner Returns With Prisma 1.4 th/s Bitcoin Miner

ASICMiner recently debuted the Tube Bitcoin ASIC miner which we reviewed at CCN. FriedCat and his team have followed up the Tube with the Prisma. The Prisma is a 1.4 th/s miner based on the ASICMiner Gen 3 BE200 chip that the Tube miner, as well as others like the Rockminer T1 and BTCGarden V1X2, use. The Prisma follows the same design as the Tube except that it is longer, featuring more chips and a lower clock rate. Clocking down and adding more chips is what ZeusMiner did with the Thunder X6 that we reviewed as well.

ASICMiner can bring the total hash rate up to 1.4 th/s and they are keeping it at a very competitive price with some vendors selling at 1.47 BTC at the time of publication. The Prisma is at a good price especially since almost all hardware miners are long on ROI due to the low BTC value right now.

he Prisma, which uses 48 chips and a lower voltage freq of 240 as opposed to the 270+ used in the Tube, is a miner that pulls just over 1200 watts at the wall. For this review, we used an EVGA 1300 watt Supernova. Gold rated or server PSUs are a must for miners that pull this much power on a 24/7 basis. The shipping gods were oddly violent and benevolent at the same time. The box was badly squashed yet thankfully ASICMiner packed it with a foam box inside. Even though one of the frame ears was bent the Prisma worked perfectly out of the box. The Prisma is built like a tank just like the Tube.

The Prisma blows air into the heatsink tunnel using a very loud fan. At times, the fan was hitting 80 dB while in a room with an ambient temp of 73-degrees F at 4 feet. When moved to the mining room with an ambient temp of 50-degrees F at 4 feet it quieted to 72 dB. The Prisma is louder than the Spondoolies SP30. We did not see any fan speed control in the firmware of the BE200 controller. The BE200 controller is back on the Prisma with that same firmware. The Prisma should be preset to a freq of 240; if not, make sure that you set it to 240 before connecting the Prisma. That way the Prisma is not damaged by the freq being too high. The BE200 has not been updated officially yet to have failover pools, and the stratum bug is still there from the Tube and the T1 that also shipped with this controller. There is supposed to be an update on the way that will allow for failover pools and better stratum compatibility. There is also a USB adapter on the way so that the Prisma, Tube, and T1 can be used with an RPi or Windows. Once the USB adapter arrives, CCN will bring you an update detailing how well the RPi works with them all.


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