Antminer S21 Pro
Bitcoin miner from Bitmain. The workhorse of modern air cooled farms. Strong efficiency at scale with standard deployment on rack shelves and wide PSU availability.
- New, Bitmain warranty
- Price and lead time on your quote
Antminer S21 Pro 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 |
|---|---|---|---|
| 245 TH/s | 3,675 W | 15.0 J/TH | Select 245 TH/s |
| 234 TH/s | 3,510 W | 15.0 J/TH | Selected |
| 220 TH/s | 3,300 W | 15.0 J/TH | Select 220 TH/s |
About the Antminer S21 Pro
The Antminer S21 Pro is the workhorse of modern air cooled farms, a Bitmain SHA-256 miner with strong efficiency at scale. In this factory version it runs at 234 TH/s on 3,510 W, which is 15.0 J/TH. The 245 and 220 TH/s versions keep the same efficiency at 3,675 and 3,300 W, so a site can match the power per unit to its supply without giving up joules per terahash.
It runs on 220 to 277 V and uses about 84.2 kWh a day per unit. Deployment is standard: rack shelves, 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 14.2 kg, and replacement power supplies are widely available.
Specifications
Manufacturer reference values, confirmed per batch on the quote.
Scope of delivery
- The miner with integrated PSU
- Original manufacturer packaging
- Serial numbers per unit and warranty reference
- 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: 3,510 W rated power, 24 hours, one unit. Cooling overhead and PSU losses not included; no revenue assumptions.
How much power does the Antminer S21 Pro use?
How efficient is the Antminer S21 Pro?
Which coins can the Antminer S21 Pro mine?
What does a site need for the Antminer S21 Pro?
How loud is the Antminer S21 Pro?
What warranty comes with the Antminer S21 Pro?
Can I order a single unit?
How fast can you deliver?
Read before you buy the Antminer S21 Pro
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.
Air, hydro or immersion: matching cooling to your site
The cooling route you pick decides which machines you can even consider, how loud your site is, and how much you spend before the first miner is switched on.
How loud is a mining site, and what to do about it
Noise is the most common reason a running site gets shut down, and the least often budgeted for. What the numbers mean, and what actually works.
Compared with related models
The closest machines by condition, algorithm, manufacturer and cooling.
