Bitmain Antminer S21 Immersion (301Th)
Bitmain Antminer S21 Immersion (301Th) vs MicroBT Whatsminer M3
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Immersion (301Th) | Specification | MicroBT Whatsminer M3 |
|---|---|---|
| 301.0 TH/s | Taux de hachage | 12.0 TH/s |
| 5,569 W | Consommation électrique | 2,000 W |
| 18.5 J/TH | Efficiency | 166.7 J/TH |
| 50 dB | Niveau de bruit | — |
| 17.2 kg | Weight | 8,100.0 kg |
| 19,001 BTU/hr | BTU Output | 6,824 BTU/hr |
| 44/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer S21 Immersion (301Th)
MicroBT Whatsminer M3
Based on BTC price of $78,241 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: 4 of 5 factors go its way (efficacité, hashrate, score de minage domestique, niveau sonore). Where it pulls away hardest is 2408% more hashrate (301.0 vs 12.0 TH/s). The MicroBT Whatsminer M3 claws back ground on 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 MicroBT Whatsminer M3 actually differ, with the gap quantified:
- Bitmain Antminer S21 Immersion (301Th) 2408% more hashrate (301.0 vs 12.0 TH/s)
- MicroBT Whatsminer M3 64% better power draw (5,569 vs 2,000 W)
- Bitmain Antminer S21 Immersion (301Th) 89% better efficacité (18.5 vs 166.7 J/TH)
- Bitmain Antminer S21 Immersion (301Th) 100% better weight (17.2 vs 8,100.0 kg)
- Bitmain Antminer S21 Immersion (301Th) 178% more heat output (19,001 vs 6,824 BTU/hr)
- Bitmain Antminer S21 Immersion (301Th) 57% more score de minage domestique (44.0 vs 28.0)
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 Immersion (301Th) | Metric | MicroBT Whatsminer M3 |
|---|---|---|
| $3,333 | Upfront cost (MSRP) | — |
| -$2.53 | Daily net profit | -$4.37 |
| -$4,255 | Net after 1 year | -$1,594 |
| -$5,178 | Net after 2 years | -$3,189 |
| -$6,101 | Net after 3 years | -$4,783 |
| 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
Which makes more money, the Bitmain Antminer S21 Immersion (301Th) or the MicroBT Whatsminer M3?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Immersion (301Th) is more profitable at $-2.53/day compared to $-4.37/day for the MicroBT Whatsminer M3. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S21 Immersion (301Th) or the MicroBT Whatsminer M3 better for noise-sensitive spaces?
The Bitmain Antminer S21 Immersion (301Th) is quieter at 50 dB compared to the MicroBT Whatsminer M3 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 MicroBT Whatsminer M3?
The Bitmain Antminer S21 Immersion (301Th) scores 44/100 on our Home Mining Score (vs 28/100 for the MicroBT Whatsminer M3). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S21 Immersion (301Th) vs MicroBT Whatsminer M3: how much does the efficiency gap matter?
The Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH while the MicroBT Whatsminer M3 runs at 166.7 J/TH — a difference of 148.2 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 89% better efficacité (18.5 vs 166.7 J/TH).
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