Bitmain Antminer S21 Immersion (301Th)
Bitmain Antminer S21 Immersion (301Th) vs Whatsminer M63
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Immersion (301Th) | Specification | Whatsminer M63 |
|---|---|---|
| 301.0 TH/s | Taux de hachage | 360.0 TH/s |
| 5,569 W | Consommation électrique | 7,200 W |
| 18.5 J/TH | Efficiency | 20.0 J/TH |
| 50 dB | Niveau de bruit | 50 dB |
| 17.2 kg | Weight | 27.5 kg |
| 19,001 BTU/hr | BTU Output | 24,566 BTU/hr |
| 44/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer S21 Immersion (301Th)
Whatsminer M63
Based on BTC price of $78,190 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S21 Immersion (301Th) edges it: 3 of 4 factors go its way (efficacité, consommation électrique, rapport qualité-prix). Where it pulls away hardest is 23% better power draw (5,569 vs 7,200 W). The Whatsminer M63 holds the edge in hashrate. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Here is every spec where the Bitmain Antminer S21 Immersion (301Th) and Whatsminer M63 actually differ, with the gap quantified:
- Whatsminer M63 20% more hashrate (301 vs 360 TH/s)
- Bitmain Antminer S21 Immersion (301Th) 23% better power draw (5,569 vs 7,200 W)
- Bitmain Antminer S21 Immersion (301Th) 8% better efficacité (18.5 vs 20.0 J/TH)
- Bitmain Antminer S21 Immersion (301Th) 38% better weight (17.2 vs 27.5 kg)
- Whatsminer M63 29% more heat output (19,001 vs 24,566 BTU/hr)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Bitmain Antminer S21 Immersion (301Th) | Metric | Whatsminer M63 |
|---|---|---|
| $3,333 | Upfront cost (MSRP) | $11,000 |
| -$2.54 | Daily net profit | -$4.33 |
| -$4,258 | Net after 1 year | -$12,579 |
| -$5,183 | Net after 2 years | -$14,158 |
| -$6,108 | Net after 3 years | -$15,738 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
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
Bitmain Antminer S21 Immersion (301Th)18.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S21 Immersion (301Th) or the Whatsminer M63?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Immersion (301Th) is more profitable at $-2.54/day compared to $-4.33/day for the Whatsminer M63. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S21 Immersion (301Th) vs Whatsminer M63: which runs at a lower noise level?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
For mining at home, should I pick the Bitmain Antminer S21 Immersion (301Th) or the Whatsminer M63?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
How far apart are the Bitmain Antminer S21 Immersion (301Th) and Whatsminer M63 on J/TH?
The Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH while the Whatsminer M63 runs at 20.0 J/TH — a difference of 1.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 8% better efficacité (18.5 vs 20.0 J/TH).
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