Antminer T21
Bitcoin miner from Bitmain. Used T21 units, function tested before dispatch. Entry price point per terahash for sites where a low power price carries the model.
- Used, function tested, 10 days DOA
- From 100 units per model
- Price and lead time on your quote
Antminer T21 versions
The same machine, binned at the factory. Choose the rate you want; the quote names the batch actually allocated to you.
| Hashrate | Power | Efficiency | Selection |
|---|---|---|---|
| 190 TH/s | 3,610 W | 19.0 J/TH | Select 190 TH/s |
| 180 TH/s | 3,420 W | 19.0 J/TH | Selected |
About the Antminer T21
The Antminer T21 is an air cooled SHA-256 miner from Bitmain for sites where power is cheap. In this factory version it runs at 180 TH/s on 3,420 W, which is 19.0 J/TH; the 190 TH/s version draws 3,610 W at the same efficiency. It has the dimensions of the S21 Pro and the S21+, which need less energy per terahash, so it fits the same racks.
It runs on single phase supply at 220 to 277 V and uses about 82.1 kWh a day per unit. The site provides airflow and heat exhaust, hot and cold separation, and sound insulation near housing, since it runs at about 76 dB; the rated range is 5 to 45 °C ambient. Each unit measures 400 × 195 × 290 mm and weighs 13.8 kg.
Specifications
Manufacturer reference values, confirmed per batch on the quote.
Scope of delivery
- The miner with integrated PSU
- Protective export packaging
- Serial numbers per unit, the test record and condition notes
- Airflow and heat exhaust
- Hot and cold separation
- Sound insulation near housing
- Power cords and PDU
Air cooling. The simplest of the three routes and the lowest infrastructure cost. Sustained ambient above the rated range derates performance, so size the exhaust for the warmest week.
Energy only: 3,420 W rated power, 24 hours, one unit. Cooling overhead and PSU losses not included; no revenue assumptions.
How much power does the Antminer T21 use?
How efficient is the Antminer T21?
Which coins can the Antminer T21 mine?
What does a site need for the Antminer T21?
How loud is the Antminer T21?
What warranty comes with the Antminer T21?
Is there a minimum order for the Antminer T21?
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Read before you buy the Antminer T21
The cheapest miners to run, which is not the cheapest to buy
Search for a cheap ASIC and you will find old machines at attractive prices. Whether they are cheap depends entirely on what you pay for electricity, and the answer flips at a point you can calculate.
What to buy at your power price: a shortlist by cents per kWh
The same catalogue produces four completely different shortlists depending on one input. Find your band and the hardware question mostly answers itself.
The breakeven power price, and why we ask for yours first
Every machine has an electricity price above which it stops making money. Work that number out and most of the hardware decision answers itself.
Compared with related models
The closest machines by condition, algorithm, manufacturer and cooling.
