Antminer S21+
Bitcoin miner from Bitmain. Balanced air cooled miner for operators optimizing purchase price against efficiency. Popular for midsize expansions.
- New, Bitmain warranty
- Price and lead time on your quote
Antminer S21+ 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 |
|---|---|---|---|
| 235 TH/s | 3,877 W | 16.5 J/TH | Select 235 TH/s |
| 225 TH/s | 3,712 W | 16.5 J/TH | Selected |
| 216 TH/s | 3,564 W | 16.5 J/TH | Select 216 TH/s |
About the Antminer S21+
The Antminer S21+ is an air cooled SHA-256 miner of Bitmain's S21 generation, with the same dimensions as the S21 Pro. In this factory version it runs at 225 TH/s on 3,712 W, which is 16.5 J/TH; the 235 and 216 TH/s versions keep that efficiency at 3,877 and 3,564 W. Of Bitmain's air cooled S21 models, the XP and the Pro are more efficient.
It runs on single phase supply at 220 to 277 V and uses about 89.1 kWh a day per unit. Air cooling is the simplest of the three cooling routes: the site provides rack shelves, airflow and heat exhaust, hot and cold separation, and sound insulation near housing, since the unit runs at about 76 dB. The rated range is 5 to 45 °C ambient, and sustained heat above it derates performance. Each unit measures 400 × 195 × 290 mm and weighs 14.6 kg.
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: 3,712 W rated power, 24 hours, one unit. Cooling overhead and PSU losses not included; no revenue assumptions.
How much power does the Antminer S21+ use?
How efficient is the Antminer S21+?
Which coins can the Antminer S21+ mine?
What does a site need for the Antminer S21+?
How loud is the Antminer S21+?
What warranty comes with the Antminer S21+?
Can I order a single unit?
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Read before you buy the Antminer S21+
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.
