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Antminer S21 200 TH/s, angled view with the fans
Antminer S21 200 TH/s
1,700

Antminer S21 200 TH/s

S21-200TH
Free delivery from 60 €

Shipping within Spain is free once the order reaches 60 € or more.

To the rest of the European Union shipping is charged at the rates of the chosen carrier.

Profitability


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var EURUSD=0.87673;
var NET={
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 KDA:{nh:1.5589072414851978e16,rw:0.9145505,bt:1.5039,usd:0.004586,cg:'kadena'},
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 ALPH:{nh:4.325724364311059e15,rw:0.14331781,bt:0.5369,usd:0.038140,cg:'alephium'}};
/* алгоритм: [регэксп поиска в значении характеристики, монеты] */
var ALGOS=[
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 [/scrypt/i,['LTC','DOGE']],
 [/sha[\s-]?256/i,['BTC']],
 [/equihash/i,['ZEC']],
 [/randomx/i,['XMR']],
 [/x11/i,['DASH']],
 [/eaglesong/i,['CKB']],
 [/blake2b/i,['HNS']],
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/* ---------- расчёт ---------- */
var liveEUR=null;
function revDay(s){
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function build(){
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 var ids=[],k;for(k in NET)ids.push(NET[k].cg);
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Delivery
Self-pickup at your expense
Tomorrow from 09:00 to 20:00, Store location
Free
Payment options
Bizum USDT Mastercard Visa
Cash, bank card, credit/installment payment, bank transfer for legal entities
Warranty and returns
Characteristics
Algorithm
SHA-256 Bitcoin
Brands
Bitmain
Chip count
324
Chip model
BM1368
Control board type
  • Amlogic
Cooling
Air
Electricity consumption
3500 W
Energy efficiency
17.5j/ths
Hashboards
3
Hashrate
200 TH/s
Power connector
P13
Power phases
1
Description

The Antminer S21 is an air cooled Bitmain ASIC for SHA-256, built on BM1368 chips. Inside there are three hash boards and 324 chips, which is where 200 TH/s at 3500 W comes from. Worked out per unit of hashing that is 17,5 joules per terahash. You can estimate earnings in the Antminer S21 profitability calculator.

Over a day the machine gets through about 84 kWh. At 0,10 € per kilowatt that is 8,40 € a day, and this figure, not the price of the hardware, decides whether the setup makes money. The S21 usually goes on a single phase in a garage or a utility room, two to six units per space.

Technical specifications

AlgorithmSHA-256 (BTC, BCH, BSV)
Hashrate200 TH/s (±3%)
Power draw3500 W (±5%)
Efficiency17,5 J/TH
ChipBM1368
Hash boards3
Chips324
Control boardAmlogic
Power input220 to 277 V AC, single phase, built in PSU
Power connectorP13
CoolingAir, 4 fans
Noise75 dB
ConnectionEthernet
Weight14,6 kg

How the S21 differs from neighbouring models

Against the S19 generation the difference is not the hashrate but the electricity bill. The various S19 versions sat somewhere between 21 and 30 J/TH, meaning they pay 20 to 70 per cent more in power for the same hashrate. Keeping an S19 today makes sense only where the kilowatt costs next to nothing.

The S21 series itself has hydro and immersion versions. They pull more terahashes out of one chassis, but they need a coolant loop or a tank of dielectric fluid, which means a separate room and plumbing. The air cooled S21 goes where none of that exists: a socket, a breaker, an extractor.

The Pro and XP versions use fewer joules per terahash but cost more per terahash bought. That premium only pays back on an expensive kilowatt, so do the sum against your own tariff rather than the datasheet.

What it takes to run it

3500 W continuous at 230 V works out at about 15,2 A. The line is run in 4 mm² cable at minimum, protected by a 20 A breaker and a residual current device, and the socket is shared with nothing. Single phase input, P13 connector on the miner, PSU built in. How cable size and breaker rating are worked out: power supply and wiring for an ASIC miner.

Power lineA 4 mm² cable, a 20 A breaker and residual current protection. The socket is not shared.
RouterWith a free RJ45 port. The miner has no Wi-Fi.
Network cableTwisted pair crimped at both ends, as long as the site needs.
InternetA permanent connection, the miner runs around the clock.
ComputerTo find the miner on the network and open its web panel.

After that the miner has to be found on the network and pointed at a pool. Its IP address is reported by the IP Reporter utility, everything else is set in the web panel. The step by step procedure: how to configure an ASIC miner.

Cooling and noise

The 3,5 kW come back into the room almost entirely as heat, roughly three electric kettles running without a break. Cooling is by air, four fans, and the datasheet noise figure is 75 dB. From four machines in one room the intake and the extraction are already kept apart. Airflow sizing and the noise section: cooling ASIC miners.

Firmware

We sell it on factory Bitmain firmware, with no third party builds. The same page holds the stock firmware files with their checksums, in case the miner ever needs recovering.

Frequent questions

How much electricity does an Antminer S21 use per month?At 3500 W around the clock that is about 84 kWh a day and roughly 2520 kWh a month. At 0,10 € per kilowatt it comes to about 252 € a month in electricity alone.
Is a cheaper S19 worth buying instead of an Antminer S21?Only if your kilowatt is very cheap. S19 versions ran at 21 to 30 J/TH against 17,5 on the S21, so they pay 20 to 70 per cent more in power for the same hashrate. That eats the difference in hardware price quickly.
What separates the air cooled Antminer S21 from the hydro version?Hydro pulls more terahashes from one chassis but needs a coolant loop, a pump and a dry cooler. The air version only needs extraction. At home and in a garage people fit the air one.
Can an Antminer S21 go in a flat?No. The 75 dB on the datasheet is vacuum cleaner territory, and 3,5 kW of heat make a room unusable in summer. It needs a garage, a utility room or a space of its own.
What breaker and cable does an Antminer S21 need?At 230 V the miner draws about 15,2 A. A dedicated line in 4 mm² cable or thicker, a 20 A breaker and a residual current device. The socket is not shared with other appliances.
How many hash boards and chips are in an Antminer S21?Three hash boards and 324 BM1368 chips. That also explains repair pricing: a board is replaced whole rather than chip by chip.
Does the Antminer S21 run on three phase power?The miner itself is single phase, 220 to 277 V. Three phases come in when there are several machines: they are spread across phases so the supply is not left unbalanced.
How does the Antminer S21 compare with the S21 Pro?The Pro is leaner in joules per terahash but dearer per terahash bought. The premium pays back where electricity is expensive or where space limits how many machines fit.
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