Bitmain Antminer S21 Immersion (227Th)
Bitmain Antminer S21 Immersion (227Th) vs Block Proto Rig
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Immersion (227Th) | Specification | Block Proto Rig |
|---|---|---|
| 227.0 TH/s | Taux de hachage | 819.0 TH/s |
| 3,623 W | Consommation électrique | 12,000 W |
| 16.0 J/TH | Efficiency | 14.7 J/TH |
| 75 dB | Niveau de bruit | 80 dB |
| 17.2 kg | Weight | — |
| 12,362 BTU/hr | BTU Output | 40,944 BTU/hr |
| 30/100 | Home Mining Score | — |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Block Inc |
Profitability Comparison
Bitmain Antminer S21 Immersion (227Th)
Block Proto Rig
Based on BTC price of $78,190 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Block Proto Rig comes out ahead — it takes 2 of 5 (efficacité, hashrate). Its biggest concrete edge: 261% more hashrate (227 vs 819 TH/s). That said, the Bitmain Antminer S21 Immersion (227Th) isn't beaten everywhere — it still wins consommation électrique and score de minage domestique and niveau sonore. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S21 Immersion (227Th) and Block Proto Rig sit on each measurable spec:
- Block Proto Rig 261% more hashrate (227 vs 819 TH/s)
- Bitmain Antminer S21 Immersion (227Th) 70% better power draw (3,623 vs 12,000 W)
- Block Proto Rig 8% better efficacité (16.0 vs 14.7 J/TH)
- Bitmain Antminer S21 Immersion (227Th) 6% better noise (75.0 vs 80.0 dB)
- Block Proto Rig 231% more heat output (12,362 vs 40,944 BTU/hr)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Bitmain Antminer S21 Immersion (227Th) | Metric | Block Proto Rig |
|---|---|---|
| $3,269 | Upfront cost (MSRP) | — |
| -$0.53 | Daily net profit | $0.67 |
| -$3,461 | Net after 1 year | +$244 |
| -$3,654 | Net after 2 years | +$488 |
| -$3,846 | Net after 3 years | +$733 |
| 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
Block Proto Rig$1.20/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21 Immersion (227Th)Score: 30/100. 75 dB noise level.
Best for Efficiency
Block Proto Rig14.7 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S21 Immersion (227Th) or the Block Proto Rig?
At the current BTC price and a $0.10/kWh electricity rate, the Block Proto Rig is more profitable at $0.67/day compared to $-0.53/day for the Bitmain Antminer S21 Immersion (227Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S21 Immersion (227Th) or the Block Proto Rig better for noise-sensitive spaces?
The Bitmain Antminer S21 Immersion (227Th) is quieter at 75 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 (227Th) or the Block Proto Rig?
The Bitmain Antminer S21 Immersion (227Th) scores 30/100 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 (227Th) and Block Proto Rig on J/TH?
The Bitmain Antminer S21 Immersion (227Th) runs at 16.0 J/TH while the Block Proto Rig runs at 14.7 J/TH — a difference of 1.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 8% better efficacité (16.0 vs 14.7 J/TH).
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