SHA-256 · air-cooled
Air-cooled at 15 W/TH, which makes it far easier to deploy than the hydro models while staying competitive on efficiency. Still far too loud for a home without a dedicated, isolated space.
Operating profit
$2.23
per day · 0.000115 BTC
Break-even electricity
$0.0864
per kWh · $0.0264 above your rate
Payback period
—
Enter a hardware cost to estimate payback
Revenue assumes a 1% pool fee at the current BTC price and network difficulty, with the machine running continuously. Payback needs a hardware cost, which we do not publish because we have no verified retailer feed — add your own purchase price in the calculator. Your rate is saved in this browser and applies across the site.
| Manufacturer | Bitmain |
|---|---|
| Model | Antminer S21 Pro |
| Algorithm | SHA-256 |
| Coins | Bitcoin |
| Hashrate | 234 TH/s |
| Power | 3,510 W |
| Efficiency | 15.0 W/TH |
| Cooling | Air |
| Type | ASIC |
| Released | 2024 |
| Home suitable | No — noise and power draw |
Data provenance
Manufacturer figures, corroborated against published reviews. Last verified 2026-07-31.
Noise, dimensions, weight and warranty are not listed because we have not verified them for this machine. We would rather leave a field empty than publish a figure you cannot check.
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