Posts Tagged ‘Bitmain BM1385


Bitmain has a new interesting offer for miners in the form of a lower hashrate ASIC miner for Bitcoin called AntMiner S7-LN that comes packaged with a 1KW Enermax ATX PSU. The new Bitmain AntMiner S7-LN apparently has less chips – 90x BM1385 instead of the 135 found in the regular S7 and as a result you get a bit more than half the hashrate at about half the power usage. The AntMiner S7-LN is rated at 2.7 THS hashrate and about 700W of power usage at the wall and can be yours for $291 USD without the shipping and taxes per unit – the miner and the PSU for it – with the shipping expected to start on June 2nd. The good thing about this offer is that the PSU is a regular ATX one so it can be used for a PC or a GPU mining rig and not only for ASIC miners when the time to shut down the S7-LN comes.

Bitmain AntMiner S7-LN Specifications:
– Hash Rate: 2.7 TH/s ±5%
– Power Consumption: 697W + 10% (at the wall, with Enermax, 25C ambient temp)
– Power Efficiency: 0.25 J/GH + 10% (at the wall, with Enermax, 25°C ambient temp)
– Rated Voltage: 11.60~13.00V
– Chip quantity per unit: 90x BM1385
– Dimensions: 306mm(L)*150mm(W)*275mm(H)
– Cooling: 2x 12038 fan
– Operating Temperature: 0 °C to 40 °C
– Network Connection: Ethernet
– Default Frequency: 700 MHz
– PSU: 1000W Enermax golden power supply

The only drawback is that the Bitcoin block reward halving is right around the corner, so in about a month and a half the coins mined by the miner will be cut in half. So now it might not be the best time to consider purchasing the current generation of Bitcoin ASIC miners even of the offer is an attractive one. So consider carefully whether now is the right time to purchase SHA256 ASIC mining hardware or better to wait for the halving and then consider what to do…


After the recent announcement of the new BitMain BM1385 ASIC chips for mining Bitcoin or other SHA-256 crypto currencies BitMain has started taking pre-orders for their first miner based on the new chips – the Antminer S7. The new BitMain Antminer S7 miner has a more dense configuration than previous Antminer machines, using 162 chips in the same space that the S5 used only 60 in. The S7 uses just 1210 watts of electricity to deliver 4.86 terahashes per second of mining power per unit, so specification wise the new miners looks very attractive, especially when compared to older hardware.


BitMain AntMiner S7 Specifications:
1. Hash Rate: 4.86 TH/s ±5%
2. Power Consumption: 1210 W (at the wall, with APW3, 93% efficiency, 25C ambient temp)
3. Power Efficiency: 0.25 J/GH (at the wall, with APW3, 93% efficiency, 25°C ambient temp)
4. Rated Voltage: 12V+5%, should not be less than 12.0V
5. Chip quantity per unit: 162x BM1385
6. Dimensions: 301mm(L)*123mm(W)*155mm(H)
7. Cooling: 2x 12038 fan
8. Operating Temperature: 0 °C to 40 °C
9. Network Connection: Ethernet

You can get the new miner for $1823 USD or roughly 7.896 BTC with the current exchange rate. When you add a suitable power supply like the 1600W APW3-12-1600-B2 that Bitmain sells for $155 USD (0.671 BTC) and you factor in the cost of shipping and custom taxes, electricity and the slowly increasing network difficulty you are already looking in probably 8-9 months at least to get back what you have paid for the miner. So although specifications wise the device looks very good it is still slow to ROI in the current not so great for Bitcoin conditions, but then again this is probably the best Bitcoin mining hardware available to end users at the moment. You can already pre-order a BitMain AntMiner S7 from Batch 1 with expected shipping date announced as late September of 21~30 with a possible delay of up to 10 days extra.


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.