Bitmain Antminer S21 Immersion (301Th) vs Bitmain Antminer S9 SE (16Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Immersion (301Th) | Specification | Bitmain Antminer S9 SE (16Th) |
|---|---|---|
| 301.0 TH/s | Hashrate | 16.0 TH/s |
| 5,569 W | Power Consumption | 1,280 W |
| 18.5 J/TH | Efficiency | 80.0 J/TH |
| 50 dB | Noise Level | — |
| 17.2 kg | Weight | 4,560.0 kg |
| 19,001 BTU/hr | BTU Output | 4,367 BTU/hr |
| 44/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21 Immersion (301Th)
Bitmain Antminer S9 SE (16Th)
Based on BTC price of $79,090 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S21 Immersion (301Th) edges it: 4 of 5 factors go its way (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 1781% more hashrate (301.0 vs 16.0 TH/s). That said, the Bitmain Antminer S9 SE (16Th) isn't beaten everywhere — it still wins power consumption. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S21 Immersion (301Th) and Bitmain Antminer S9 SE (16Th) sit on each measurable spec:
- Bitmain Antminer S21 Immersion (301Th) 1781% more hashrate (301.0 vs 16.0 TH/s)
- Bitmain Antminer S9 SE (16Th) 77% better power draw (5,569 vs 1,280 W)
- Bitmain Antminer S21 Immersion (301Th) 77% better efficiency (18.5 vs 80.0 J/TH)
- Bitmain Antminer S21 Immersion (301Th) 100% better weight (17.2 vs 4,560.0 kg)
- Bitmain Antminer S21 Immersion (301Th) 335% more heat output (19,001 vs 4,367 BTU/hr)
- Bitmain Antminer S21 Immersion (301Th) 42% more home mining score (44.0 vs 31.0)
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 | Bitmain Antminer S9 SE (16Th) |
|---|---|---|
| $3,333 | Upfront cost (MSRP) | — |
| -$2.41 | Daily net profit | -$2.49 |
| -$4,212 | Net after 1 year | -$909 |
| -$5,092 | Net after 2 years | -$1,817 |
| -$5,972 | Net after 3 years | -$2,726 |
| 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
Bitmain Antminer S21 Immersion (301Th)18.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S21 Immersion (301Th) vs Bitmain Antminer S9 SE (16Th): 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 $-2.41/day compared to $-2.49/day for the Bitmain Antminer S9 SE (16Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S21 Immersion (301Th) vs Bitmain Antminer S9 SE (16Th): which runs at a lower noise level?
The Bitmain Antminer S21 Immersion (301Th) is quieter at 50 dB compared to the Bitmain Antminer S9 SE (16Th) at 0 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 Bitmain Antminer S9 SE (16Th)?
The Bitmain Antminer S21 Immersion (301Th) scores 44/100 on our Home Mining Score (vs 31/100 for the Bitmain Antminer S9 SE (16Th)). 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 Bitmain Antminer S9 SE (16Th) on J/TH?
The Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH while the Bitmain Antminer S9 SE (16Th) runs at 80.0 J/TH — a difference of 61.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 77% better efficiency (18.5 vs 80.0 J/TH).
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