Bitmain Antminer S21 Immersion (301Th)
Bitmain Antminer S21 Immersion (301Th) vs Block Proto Rig
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Immersion (301Th) | Specification | Block Proto Rig |
|---|---|---|
| 301.0 TH/s | Taux de hachage | 819.0 TH/s |
| 5,569 W | Consommation électrique | 12,000 W |
| 18.5 J/TH | Efficiency | 14.7 J/TH |
| 50 dB | Niveau de bruit | 80 dB |
| 17.2 kg | Weight | — |
| 19,001 BTU/hr | BTU Output | 40,944 BTU/hr |
| 44/100 | Home Mining Score | — |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Block Inc |
Profitability Comparison
Bitmain Antminer S21 Immersion (301Th)
Block Proto Rig
Based on BTC price of $62,822 and current network difficulty as of Jun 4, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Block Proto Rig edges it: 2 of 5 factors go its way (efficacité, hashrate). Where it pulls away hardest is 172% more hashrate (301 vs 819 TH/s). That said, the Bitmain Antminer S21 Immersion (301Th) isn't beaten everywhere — it still wins consommation électrique and score de minage domestique and niveau sonore. Cross-check the spec deltas and operating-cost table above against your own electricity rate before deciding.
Spec Deltas
The Bitmain Antminer S21 Immersion (301Th) and Block Proto Rig diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Block Proto Rig 172% more hashrate (301 vs 819 TH/s)
- Bitmain Antminer S21 Immersion (301Th) 54% better power draw (5,569 vs 12,000 W)
- Block Proto Rig 21% better efficacité (18.5 vs 14.7 J/TH)
- Bitmain Antminer S21 Immersion (301Th) 38% better noise (50.0 vs 80.0 dB)
- Block Proto Rig 115% more heat output (19,001 vs 40,944 BTU/hr)
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 | Block Proto Rig |
|---|---|---|
| $3,333 | Upfront cost (MSRP) | — |
| -$4.81 | Daily net profit | -$5.52 |
| -$5,088 | Net after 1 year | -$2,016 |
| -$6,844 | Net after 2 years | -$4,032 |
| -$8,600 | Net after 3 years | -$6,048 |
| 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
Bitmain Antminer S21 Immersion (301Th)Score: 44/100. 50 dB noise level.
Best for Efficiency
Block Proto Rig14.7 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S21 Immersion (301Th) vs Block Proto Rig: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Immersion (301Th) is more profitable at $-4.81/day compared to $-5.52/day for the Block Proto Rig. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S21 Immersion (301Th) vs Block Proto Rig: which runs at a lower noise level?
The Bitmain Antminer S21 Immersion (301Th) is quieter at 50 dB compared to the Block Proto Rig at 80 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Bitmain Antminer S21 Immersion (301Th) or the Block Proto Rig?
The Bitmain Antminer S21 Immersion (301Th) scores 44/100 on our Home Mining Score (vs 0/100 for the Block Proto Rig). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Bitmain Antminer S21 Immersion (301Th) and Block Proto Rig on J/TH?
The Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH while the Block Proto Rig runs at 14.7 J/TH — a difference of 3.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 21% better efficacité (18.5 vs 14.7 J/TH).
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