Antminer S19j Pro vs Bitmain Antminer S21 Immersion (301Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S19j Pro | Specification | Bitmain Antminer S21 Immersion (301Th) |
|---|---|---|
| 100.0 TH/s | Hashrate | 301.0 TH/s |
| 3,050 W | Power Consumption | 5,569 W |
| 30.5 J/TH | Efficiency | 18.5 J/TH |
| 75 dB | Noise Level | 50 dB |
| 13.2 kg | Weight | 17.2 kg |
| 10,407 BTU/hr | BTU Output | 19,001 BTU/hr |
| 84/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S19j Pro
Bitmain Antminer S21 Immersion (301Th)
Based on BTC price of $70,303 and current network difficulty as of Mar 24, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitmain Antminer S21 Immersion (301Th) wins on 4 of 6 factors (efficiency, hashrate, noise level, price-performance). The Antminer S19j Pro holds the edge in power consumption and home mining score. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer S19j ProScore: 84/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer S21 Immersion (301Th)18.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S19j Pro or Bitmain Antminer S21 Immersion (301Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Immersion (301Th) is more profitable at $-4.19/day compared to $-4.27/day for the Antminer S19j Pro. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S19j Pro or Bitmain Antminer S21 Immersion (301Th)?
The Bitmain Antminer S21 Immersion (301Th) is quieter at 50 dB compared to the Antminer S19j Pro at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S19j Pro or Bitmain Antminer S21 Immersion (301Th)?
The Antminer S19j Pro scores 84/100 on our Home Mining Score (vs 44/100 for the Bitmain Antminer S21 Immersion (301Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Antminer S19j Pro and Bitmain Antminer S21 Immersion (301Th)?
The Antminer S19j Pro runs at 30.5 J/TH while the Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH — a difference of 12.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.
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