SHA-256 · hydro-cooled
The most efficient machine in this set at 12 W/TH, and the highest break-even electricity price as a result. Hydro cooling means it needs a water loop, so it is a hosted-site or purpose-built-facility machine rather than a garage one.
Operating profit
$6.78
per day · 0.000231 BTC
Break-even electricity
$0.1097
per kWh · $0.0497 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 Payback needs a hardware cost, which we do not publish because we have no verified retailer feed — add your own purchase price in the calculator.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 XP Hyd |
| Algorithm | SHA-256 |
| Coins | Bitcoin |
| Hashrate | 473 TH/s |
| Power | 5,676 W |
| Efficiency | 12.0 W/TH |
| Cooling | Hydro |
| Type | ASIC |
| Released | 2024 |
| Home suitable | No — noise and power draw |
| Dimensions | 339 × 173 × 207 (unit, excluding case) mm |
| Weight | 13.8 kg |
| Operating temperature | 5 to 45 °C |
| Warranty | 365 days |
Data provenance
Manufacturer datasheet as published by retailers; hashrate, power and efficiency corroborated across three independent sources. Last verified 2026-08-03.
Note: No sound rating is published for this model. Hydro units have no onboard fans, so the noise comes from the external pump and dry cooler rather than the machine.
Any field not listed above is one we could not verify for this machine. We would rather leave a row out than publish a figure you cannot check. Where published sources disagree, we say so instead of picking one. How we verify specifications.
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