Bitmain Antminer S21 Immersion (301Th)
Bitmain Antminer S21 Immersion (301Th) vs Antminer S9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Immersion (301Th) | Specification | Antminer S9 |
|---|---|---|
| 301.0 TH/s | Taux de hachage | 14.0 TH/s |
| 5,569 W | Consommation électrique | 1,350 W |
| 18.5 J/TH | Efficiency | 96.4 J/TH |
| 50 dB | Niveau de bruit | 76 dB |
| 17.2 kg | Weight | 4.2 kg |
| 19,001 BTU/hr | BTU Output | 4,606 BTU/hr |
| 44/100 | Home Mining Score | 83/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21 Immersion (301Th)
Antminer S9
Based on BTC price of $62,980 and current network difficulty as of Jun 4, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer S21 Immersion (301Th), which leads on 3 of 5 weighted factors (efficacité, hashrate, niveau sonore). The standout gap is 2050% more hashrate (301.0 vs 14.0 TH/s) in the Bitmain Antminer S21 Immersion (301Th)'s favour. That said, the Antminer S9 isn't beaten everywhere — it still wins consommation électrique and score de minage domestique. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Here is every spec where the Bitmain Antminer S21 Immersion (301Th) and Antminer S9 actually differ, with the gap quantified:
- Bitmain Antminer S21 Immersion (301Th) 2050% more hashrate (301.0 vs 14.0 TH/s)
- Antminer S9 76% better power draw (5,569 vs 1,350 W)
- Bitmain Antminer S21 Immersion (301Th) 81% better efficacité (18.5 vs 96.4 J/TH)
- Bitmain Antminer S21 Immersion (301Th) 34% better noise (50.0 vs 76.0 dB)
- Antminer S9 76% better weight (17.2 vs 4.2 kg)
- Bitmain Antminer S21 Immersion (301Th) 313% more heat output (19,001 vs 4,606 BTU/hr)
- Antminer S9 89% more score de minage domestique (44.0 vs 83.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Bitmain Antminer S21 Immersion (301Th) | Metric | Antminer S9 |
|---|---|---|
| $3,333 | Upfront cost (MSRP) | — |
| -$4.79 | Daily net profit | -$2.84 |
| -$5,081 | Net after 1 year | -$1,037 |
| -$6,829 | Net after 2 years | -$2,074 |
| -$8,577 | Net after 3 years | -$3,111 |
| Does not pay back at current rates (negative daily profit) | Payback period | — |
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
Antminer S9Score: 83/100. 76 dB noise level.
Best for Efficiency
Bitmain Antminer S21 Immersion (301Th)18.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21 Immersion (301Th) or Antminer S9 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S9 is more profitable at $-2.84/day compared to $-4.79/day for the Bitmain Antminer S21 Immersion (301Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S21 Immersion (301Th) vs Antminer S9: which runs at a lower noise level?
The Bitmain Antminer S21 Immersion (301Th) is quieter at 50 dB compared to the Antminer S9 at 76 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S21 Immersion (301Th) or Antminer S9?
The Antminer S9 scores 83/100 on our Home Mining Score (vs 44/100 for the Bitmain Antminer S21 Immersion (301Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Bitmain Antminer S21 Immersion (301Th) and Antminer S9?
The Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH while the Antminer S9 runs at 96.4 J/TH — a difference of 77.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 81% better efficacité (18.5 vs 96.4 J/TH).
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