Bitmain Antminer S21 Immersion (301Th)
Bitmain Antminer S21 Immersion (301Th) vs StrongU Hornbill H8
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Immersion (301Th) | Specification | StrongU Hornbill H8 |
|---|---|---|
| 301.0 TH/s | Taux de hachage | 74.0 TH/s |
| 5,569 W | Consommation électrique | 3,330 W |
| 18.5 J/TH | Efficiency | 45.0 J/TH |
| 50 dB | Niveau de bruit | — |
| 17.2 kg | Weight | 11,500.0 kg |
| 19,001 BTU/hr | BTU Output | 11,362 BTU/hr |
| 44/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | StrongU |
Profitability Comparison
Bitmain Antminer S21 Immersion (301Th)
StrongU Hornbill H8
Based on BTC price of $78,183 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: 5 of 6 factors go its way (efficacité, hashrate, score de minage domestique, niveau sonore, rapport qualité-prix). Its biggest concrete edge: 307% more hashrate (301.0 vs 74.0 TH/s). The StrongU Hornbill H8 holds the edge in consommation électrique. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Bitmain Antminer S21 Immersion (301Th) and StrongU Hornbill H8 actually differ, with the gap quantified:
- Bitmain Antminer S21 Immersion (301Th) 307% more hashrate (301.0 vs 74.0 TH/s)
- StrongU Hornbill H8 40% better power draw (5,569 vs 3,330 W)
- Bitmain Antminer S21 Immersion (301Th) 59% better efficacité (18.5 vs 45.0 J/TH)
- Bitmain Antminer S21 Immersion (301Th) 100% better weight (17.2 vs 11,500.0 kg)
- Bitmain Antminer S21 Immersion (301Th) 67% more heat output (19,001 vs 11,362 BTU/hr)
- Bitmain Antminer S21 Immersion (301Th) 100% more score de minage domestique (44.0 vs 22.0)
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 (301Th) | Metric | StrongU Hornbill H8 |
|---|---|---|
| $3,333 | Upfront cost (MSRP) | $1,200 |
| -$2.54 | Daily net profit | -$5.33 |
| -$4,258 | Net after 1 year | -$3,145 |
| -$5,184 | Net after 2 years | -$5,091 |
| -$6,109 | Net after 3 years | -$7,036 |
| 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
Bitmain Antminer S21 Immersion (301Th)Score: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S21 Immersion (301Th)18.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S21 Immersion (301Th) vs StrongU Hornbill H8: 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 $-2.54/day compared to $-5.33/day for the StrongU Hornbill H8. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21 Immersion (301Th) or StrongU Hornbill H8?
The Bitmain Antminer S21 Immersion (301Th) is quieter at 50 dB compared to the StrongU Hornbill H8 at 0 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 StrongU Hornbill H8?
The Bitmain Antminer S21 Immersion (301Th) scores 44/100 on our Home Mining Score (vs 22/100 for the StrongU Hornbill H8). 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 StrongU Hornbill H8 on J/TH?
The Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH while the StrongU Hornbill H8 runs at 45.0 J/TH — a difference of 26.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 59% better efficacité (18.5 vs 45.0 J/TH).
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