Bitmain Antminer S21 XP Immersion vs MicroBT Whatsminer M3
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 XP Immersion | Specification | MicroBT Whatsminer M3 |
|---|---|---|
| 300.0 TH/s | Taux de hachage | 12.0 TH/s |
| 4,050 W | Consommation électrique | 2,000 W |
| 13.5 J/TH | Efficiency | 166.7 J/TH |
| 50 dB | Niveau de bruit | — |
| 14.4 kg | Weight | 8,100.0 kg |
| 13,819 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 XP Immersion
MicroBT Whatsminer M3
Based on BTC price of $78,241 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer S21 XP Immersion comes out ahead — it takes 4 of 5 (efficacité, hashrate, score de minage domestique, niveau sonore). The standout gap is 2400% more hashrate (300.0 vs 12.0 TH/s) in the Bitmain Antminer S21 XP Immersion's favour. That said, the MicroBT Whatsminer M3 isn't beaten everywhere — it still wins consommation électrique. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
The Bitmain Antminer S21 XP Immersion and MicroBT Whatsminer M3 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 XP Immersion 2400% more hashrate (300.0 vs 12.0 TH/s)
- MicroBT Whatsminer M3 51% better power draw (4,050 vs 2,000 W)
- Bitmain Antminer S21 XP Immersion 92% better efficacité (13.5 vs 166.7 J/TH)
- Bitmain Antminer S21 XP Immersion 100% better weight (14.4 vs 8,100.0 kg)
- Bitmain Antminer S21 XP Immersion 103% more heat output (13,819 vs 6,824 BTU/hr)
- Bitmain Antminer S21 XP Immersion 57% more score de minage domestique (44.0 vs 28.0)
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 XP Immersion | Metric | MicroBT Whatsminer M3 |
|---|---|---|
| $1,593 | Upfront cost (MSRP) | — |
| $1.08 | Daily net profit | -$4.37 |
| -$1,198 | Net after 1 year | -$1,594 |
| -$803 | Net after 2 years | -$3,189 |
| -$408 | Net after 3 years | -$4,783 |
| Takes ~4.0 years to pay back at current rates | 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
Bitmain Antminer S21 XP Immersion$5.45/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21 XP ImmersionScore: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S21 XP Immersion13.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21 XP Immersion or MicroBT Whatsminer M3 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 XP Immersion is more profitable at $1.08/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.
Which is quieter, the Bitmain Antminer S21 XP Immersion or MicroBT Whatsminer M3?
The Bitmain Antminer S21 XP Immersion 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 XP Immersion or MicroBT Whatsminer M3?
The Bitmain Antminer S21 XP Immersion 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.
What is the efficiency difference between Bitmain Antminer S21 XP Immersion and MicroBT Whatsminer M3?
The Bitmain Antminer S21 XP Immersion runs at 13.5 J/TH while the MicroBT Whatsminer M3 runs at 166.7 J/TH — a difference of 153.2 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 92% better efficacité (13.5 vs 166.7 J/TH).