Antminer S21 XP vs Bitdeer SealMiner A3 Pro Air
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 XP | Specification | Bitdeer SealMiner A3 Pro Air |
|---|---|---|
| 270.0 TH/s | Hashrate | 290.0 TH/s |
| 3,645 W | Power Consumption | 3,625 W |
| 13.5 J/TH | Efficiency | 12.5 J/TH |
| 75 dB | Noise Level | 75 dB |
| 15.4 kg | Weight | 15.5 kg |
| 12,437 BTU/hr | BTU Output | 12,369 BTU/hr |
| 30/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Antminer S21 XP
Bitdeer SealMiner A3 Pro Air
Based on BTC price of $70,862 and current network difficulty as of Mar 25, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitdeer SealMiner A3 Pro Air wins on 4 of 4 factors (efficiency, hashrate, power consumption, price-performance). Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
Bitdeer SealMiner A3 Pro Air$0.66/day higher profit at current rates.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
Bitdeer SealMiner A3 Pro Air12.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S21 XP or Bitdeer SealMiner A3 Pro Air more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A3 Pro Air is more profitable at $0.21/day compared to $-0.46/day for the Antminer S21 XP. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S21 XP or Bitdeer SealMiner A3 Pro Air?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Antminer S21 XP or Bitdeer SealMiner A3 Pro Air?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
What is the efficiency difference between Antminer S21 XP and Bitdeer SealMiner A3 Pro Air?
The Antminer S21 XP runs at 13.5 J/TH while the Bitdeer SealMiner A3 Pro Air runs at 12.5 J/TH — a difference of 1.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.
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