Antminer S21 vs MicroBT Whatsminer M21S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 | Specification | MicroBT Whatsminer M21S |
|---|---|---|
| 200.0 TH/s | Taux de hachage | 56.0 TH/s |
| 3,500 W | Consommation électrique | 3,360 W |
| 17.5 J/TH | Efficiency | 60.0 J/TH |
| 75 dB | Niveau de bruit | — |
| 14.6 kg | Weight | 12.5 kg |
| 11,942 BTU/hr | BTU Output | 11,464 BTU/hr |
| 36/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Antminer S21
MicroBT Whatsminer M21S
Based on BTC price of $62,980 and current network difficulty as of Jun 4, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Antminer S21 comes out ahead — it takes 4 of 6 (efficacité, hashrate, score de minage domestique, niveau sonore). Where it pulls away hardest is 257% more hashrate (200.0 vs 56.0 TH/s). The MicroBT Whatsminer M21S holds the edge in consommation électrique and rapport qualité-prix. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Antminer S21 and MicroBT Whatsminer M21S diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer S21 257% more hashrate (200.0 vs 56.0 TH/s)
- MicroBT Whatsminer M21S 4% better power draw (3,500 vs 3,360 W)
- Antminer S21 71% better efficacité (17.5 vs 60.0 J/TH)
- MicroBT Whatsminer M21S 14% better weight (14.6 vs 12.5 kg)
- Antminer S21 4% more heat output (11,942 vs 11,464 BTU/hr)
- Antminer S21 64% more score de minage domestique (36.0 vs 22.0)
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.
| Antminer S21 | Metric | MicroBT Whatsminer M21S |
|---|---|---|
| $5,500 | Upfront cost (MSRP) | $650 |
| -$2.70 | Daily net profit | -$6.47 |
| -$6,486 | Net after 1 year | -$3,011 |
| -$7,472 | Net after 2 years | -$5,372 |
| -$8,458 | Net after 3 years | -$7,733 |
| Does not pay back at current rates (negative daily profit) | 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
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer S21Score: 36/100. 75 dB noise level.
Best for Efficiency
Antminer S2117.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Antminer S21 vs MicroBT Whatsminer M21S: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 is more profitable at $-2.70/day compared to $-6.47/day for the MicroBT Whatsminer M21S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Antminer S21 vs MicroBT Whatsminer M21S: which runs at a lower noise level?
The Antminer S21 is quieter at 75 dB compared to the MicroBT Whatsminer M21S at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer S21 vs MicroBT Whatsminer M21S: which fits a residential setup better?
The Antminer S21 scores 36/100 on our Home Mining Score (vs 22/100 for the MicroBT Whatsminer M21S). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Antminer S21 and MicroBT Whatsminer M21S on J/TH?
The Antminer S21 runs at 17.5 J/TH while the MicroBT Whatsminer M21S runs at 60.0 J/TH — a difference of 42.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 71% better efficacité (17.5 vs 60.0 J/TH).