Bitmain Antminer S21+ Hyd vs Bitmain Antminer S21 Immersion (301Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21+ Hyd | Specification | Bitmain Antminer S21 Immersion (301Th) |
|---|---|---|
| 319.0 TH/s | Hashrate | 301.0 TH/s |
| 4,785 W | Power Consumption | 5,569 W |
| 15.0 J/TH | Efficiency | 18.5 J/TH |
| 50 dB | Noise Level | 50 dB |
| 17.5 kg | Weight | 17.2 kg |
| 16,326 BTU/hr | BTU Output | 19,001 BTU/hr |
| 44/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21+ Hyd
Bitmain Antminer S21 Immersion (301Th)
Based on BTC price of $79,090 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer S21+ Hyd, which leads on 4 of 4 weighted factors (efficiency, hashrate, power consumption, price-performance). Where it pulls away hardest is 19% better efficiency (15.0 vs 18.5 J/TH). Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Bitmain Antminer S21+ Hyd and Bitmain Antminer S21 Immersion (301Th) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21+ Hyd 6% more hashrate (319 vs 301 TH/s)
- Bitmain Antminer S21+ Hyd 14% better power draw (4,785 vs 5,569 W)
- Bitmain Antminer S21+ Hyd 19% better efficiency (15.0 vs 18.5 J/TH)
- Bitmain Antminer S21 Immersion (301Th) 2% better weight (17.5 vs 17.2 kg)
- Bitmain Antminer S21 Immersion (301Th) 16% more heat output (16,326 vs 19,001 BTU/hr)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Bitmain Antminer S21+ Hyd | Metric | Bitmain Antminer S21 Immersion (301Th) |
|---|---|---|
| $2,499 | Upfront cost (MSRP) | $3,333 |
| $0.13 | Daily net profit | -$2.41 |
| -$2,453 | Net after 1 year | -$4,212 |
| -$2,407 | Net after 2 years | -$5,092 |
| -$2,361 | Net after 3 years | -$5,972 |
| Takes ~54.2 years to pay back at current rates | 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
Bitmain Antminer S21+ Hyd$2.54/day higher profit at current rates.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
Bitmain Antminer S21+ Hyd15.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S21+ Hyd or the Bitmain Antminer S21 Immersion (301Th)?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21+ Hyd is more profitable at $0.13/day compared to $-2.41/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+ Hyd vs Bitmain Antminer S21 Immersion (301Th): which runs at a lower noise level?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Bitmain Antminer S21+ Hyd vs Bitmain Antminer S21 Immersion (301Th): which fits a residential setup better?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
Bitmain Antminer S21+ Hyd vs Bitmain Antminer S21 Immersion (301Th): how much does the efficiency gap matter?
The Bitmain Antminer S21+ Hyd runs at 15.0 J/TH while the Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH — a difference of 3.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 19% better efficiency (15.0 vs 18.5 J/TH).
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