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Posts Tagged ‘Bitmain’

Bitmain BM1385, a 4th Generation Bitcoin Mining ASIC Chip

21, Aug 2015

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Bitmain has announced that they have their 4th generation Bitcoin ASIC mining chips in the form of BM1385. The new BM1385 ASIC chip is apparently produced using 28-nanometer process by Taiwan Semiconductor Manufacturing Company (TSMC), capable of 32.5 GHS per chip at just 0.216 Watts of power usage per GHS with 0.66V core voltage. The BM1385 is probably going to be the most power-efficient Bitcoin mining chip ever released to public when it hits the market inside the upcoming AntMiner S7 miners that should be available pretty soon.

Since its founding in 2013, Bitmain has successively released three other generations of chips. The first was the BM1380, which utilized a 55 nanometer process node size. After that came the 28 nanometer BM1382, and then the 28 nm, semi-custom BM1384 chip. The new BM1385 chip is Bitmain’s first to feature a full custom design. This means that the chip engineers have to meticulously lay out each and every transistor inside the chip. This process requires significantly more time and effort than semi-custom chip designs, but can also result in faster processing, lower power consumption, and greater density of transistors. A well-designed full custom chip can attain massive performance gains over digital design and semi-custom design, but along with greatly increased investment required in engineer labor and time, there is a much higher risk that the chip will fail at tape-out – a very costly mistake. Bitmain concluded through internal research that a full-custom 28 nanometer chip could greatly outperform chips built on 14 and 16 nm process nodes without the use of full custom design techniques.

The BM1385 chip powered at 0.66V can attain a 32.5 gigahash per second hash rate with a power consumption of 0.216 watts per gigahash second. When compared to the BM1384, Bitmain’s newest generation of chip has a 45% greater hashrate, while simultaneously consuming 50% less electricity. This has potentially huge implications for the bitcoin mining industry, as it can significantly reduce electricity costs of miners. There are other Bitcoin ASIC manufacturers out there that claim to have better and more efficient solutions or that are working on such, however they will not be made available to end users like Bitmain will with their upcoming AntMiner S7 miners that will be based on the BM1385 chips. The AntMiner S7 Bitcoin miners are expected to be available in the third quarter of the year, so we should see them available by the end of next month. There is no word about expected specifications, aside from the fact that they will be based on the new chips and will be capable of 1 THS at just 230W power usage measured at the wall or with other words more than half the power usage of AntMiner S5 for the same hashrate.

BitMain AntMiner U3 Available Again, Comes With New Design

16, Jan 2015

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BitMain has started selling the AntMiner U3 Bitcoin ASIC miner again with a slightly different design than the original first batch, other than that the specifications remain pretty much the same (with some minor differences in cited power usage). The new AntMiner U3 Batch 2 is available with a minimum order quantity of 20 units at a price of 38 USD (0.185 BTC) and the Batch 3 is with a minimum order quantity of just 5 units available at a price of 39 USD (0.19 BTC). The BitMain AntMiner U3 ASIC miners provide 63 GHS at about 60W with 1 Watt per GHS in the new specifications that are published by BitMain with a low noise level.

BitMain AntMiner U3 Specifications:
– Max Hash Rate: 63 GH/s ±5%
– Power Efficiency: 1Watt/GH/s on wall at 0.83V
– Voltage: DC 12V input, 6A
– Chip Quantity per unit: 4
– One 80mm fan
– Noise: ~25 DB at 25 °C ambient temperature
– Hashrate and VDD core voltage can be adjusted via cgminer command line
– USB connection
– 12V AC/DC power brick of 6A, but power line not included
– Certificate Compliance: FCC/CE

BitMain has these miners available for home users that want to have access to affordable priced and silent Bitcoin ASIC miners that want to play with them just for hobby, they are not designed to ROI due to their lower hashrate and not so great power efficiency. Since they are running batch 2 and 3 this means that there is interest in these little devices from users, though you probably would want to get a single unit to play with it and not buy a minimum of 5 or 20 units. This means that most end users will probably not be interested in directly buying AntMiner U3 from BitMain, but will look for some company reselling these at a single piece quantities.

BitMain Announcing the AntMiner S5 Bitcoin ASIC Miner

25, Dec 2014

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Bitmain has announced their 3rd generation Bitcoin ASIC miner chip – the BM1384 in conjunction with its 9th product – the Antminer S5 and is getting ready to start shipping the device before the end of the year. The Antminer S5 is the successor of the S3 and the S1 before that, building and improving the design of the previous generation of miners offering higher performance with lower power consumption thanks to the new BM1384 ASIC chips. The Bitmain AntMiner S5 should offer 1155 GHS hashrate with 590 Watt power usage at the wall according to the specifications, though that value may vary based on the power supply that you may pair the miner with (power supply is not included). The first batch of the S5 ASIC miners costs $418 USD and should start shipping on December 27th, the second batch is slightly cheaper at $413 USD per unit and should start shipping on January 4th 2015 or a few days later.


BitMain AntMiner S5 Specifications:

– Hash Rate: 1155 GH/s ±5%
– Power Consumption: 590 W (at the wall)
– Power Efficiency: 0.51 J/GH (at the wall)
– Rated Voltage: 12V
– Dimensions: 298 mm x 137 mm x 155 mm
– Cooling: 1x 12038 fan
– Operating Conditions: 0 °C to 35 °C
– Certified By: FCC / CE
– Network Connection: Ethernet

What seems to be the most notable change in the latest design used by the S5 is the fact that now the miner has the aluminum heatsinks placed directly on top of the ASIC chips, unlike on the previous miners where they were on the back of the PCB and thus were not so effective. This new cooling design is supposed to provide the same cooling efficiency on the new miners that previous generation that had lower hashrate and power usage.


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