Antminer S21 Hydro vs Whatsminer M63
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 Hydro | Specification | Whatsminer M63 |
|---|---|---|
| 335.0 TH/s | Hashrate | 360.0 TH/s |
| 5,360 W | Power Consumption | 7,200 W |
| 16.0 J/TH | Efficiency | 20.0 J/TH |
| 50 dB | Noise Level | 50 dB |
| 15.8 kg | Weight | 27.5 kg |
| 18,288 BTU/hr | BTU Output | 24,566 BTU/hr |
| 44/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Antminer S21 Hydro
Whatsminer M63
Based on BTC price of $70,303 and current network difficulty as of Mar 24, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer S21 Hydro wins on 3 of 4 factors (efficiency, power consumption, price-performance). The Whatsminer M63 holds the edge in hashrate. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
Antminer S21 Hydro16.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S21 Hydro or Whatsminer M63 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 Hydro is more profitable at $-2.66/day compared to $-6.31/day for the Whatsminer M63. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S21 Hydro or Whatsminer M63?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Antminer S21 Hydro or Whatsminer M63?
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 Hydro and Whatsminer M63?
The Antminer S21 Hydro runs at 16.0 J/TH while the Whatsminer M63 runs at 20.0 J/TH — a difference of 4.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.