Bitmain Antminer S7 mining Bitcoin ASIC

Bitmain’s AntMiner S7 has proven so popular since its release in mid-2015 that it’s now reached its 19th batch of production.

The S7 assumed market dominance for good reason:

It offers a high hashrate for the amount of power it consumes.

If you view any modern industrial mining operation, chances are you’ll see racks of AntMiner S7s hashing away. The S7 is also a popular choice among hobbyist miners for its reasonable price and strong performance.

The S7 is powered by a 28nm BM1385 ASIC chip. 135 of these chips are spread across 3 boards and kept cool by dual fans (or a single fan in the case of a particular batch).

The strong metal casing features a tongue and groove system which allows for the neat arrangement of multiple miners.

Power Supply

Recommended for use with the S7 is Bitmain’s high quality 1600 Watt APW3 power supply unit, designed specifically for use with Bitcoin miners.

This PSU is highly efficient, losing only 7% of electricity between outlet and miner. The APW3 requires a minimum 205 Volts to function and does not ship with the necessary 16A power cord.

Although not cheap at $140 plus shipping, the APW3 is a good choice in terms of future upgradability as it can also run the power-hungry AntMiner S9.

It’s also possible to use any ATX PSU of sufficient Wattage to run the S7.

The S7-LN includes its own PSU; a 1000W Enermax, rated Gold (above 80% efficiency). As the S7-LN only draws about 700W, this PSU has excess capacity even when overclocking the unit above its default 600M frequency.

It also adds quite a lot of weight to the unit, increasing its shipping cost.

While an integral PSU makes for a compact and convenient miner, there are few other reasons to recommend such a setup. The S7-LN also excludes a cord.

Power Consumption

The S7 draws a minimum of 1293 Watts at a room temperature of 25^C / 77^F. Naturally, the hotter the environment, the more energy the fan(s) will consume to cool the unit.

The S7 is twice as efficient as the S5 at converting all this energy into bitcoins; it requires a modest 0.25 Joules of power per Gigahash.

As mentioned, the LN (“Lite”) version draws only 700W. It likewise consumes 0.25 J/GH.

Setup

Both S7’s have DHCP capability, meaning they’ll automatically seek out an IP address to use.

Setting them up via the MinerLink GUI is a simple process, requiring only your mining pool credentials to begin mining.

The units will automatically begin hashing upon powering up, which can be helpful in the event of power failure. S7 connectivity is via Ethernet only.

Temperature

Both S7 versions will operate well below an ambient temperature of 40^C / 77^C. They are both cooled by dual 12038 fans.

Keeping the room in which they’re placed cool and dry will extend the life of these miners. A dry basement is an ideal location.

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