MicroBT Whatsminer M21 vs MicroBT Whatsminer M21S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | MicroBT Whatsminer M21S |
|---|---|---|
| 31.0 TH/s | Hashrate | 56.0 TH/s |
| 1,860 W | Power Consumption | 3,360 W |
| 60.0 J/TH | Efficiency | 60.0 J/TH |
| — | Noise Level | — |
| 7,150.0 kg | Weight | 12,500.0 kg |
| 6,346 BTU/hr | BTU Output | 11,464 BTU/hr |
| 28/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21
MicroBT Whatsminer M21S
Based on BTC price of $78,230 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the MicroBT Whatsminer M21 comes out ahead — it takes 2 of 3 (power consumption, home mining score). The standout gap is 45% better power draw (1,860 vs 3,360 W) in the MicroBT Whatsminer M21's favour. That said, the MicroBT Whatsminer M21S isn't beaten everywhere — it still wins hashrate. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The MicroBT Whatsminer M21 and MicroBT Whatsminer M21S diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- MicroBT Whatsminer M21S 81% more hashrate (31.0 vs 56.0 TH/s)
- MicroBT Whatsminer M21 45% better power draw (1,860 vs 3,360 W)
- MicroBT Whatsminer M21 43% better weight (7,150 vs 12,500 kg)
- MicroBT Whatsminer M21S 81% more heat output (6,346 vs 11,464 BTU/hr)
- MicroBT Whatsminer M21 27% more home mining score (28.0 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.
| MicroBT Whatsminer M21 | Metric | MicroBT Whatsminer M21S |
|---|---|---|
| — | Upfront cost (MSRP) | $650 |
| -$3.35 | Daily net profit | -$6.05 |
| -$1,222 | Net after 1 year | -$2,858 |
| -$2,444 | Net after 2 years | -$5,065 |
| -$3,666 | Net after 3 years | -$7,273 |
| — | 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
MicroBT Whatsminer M21Score: 28/100. 0 dB noise level.
Best for Efficiency
TieBoth miners have comparable efficiency.
Frequently Asked Questions
MicroBT Whatsminer M21 vs MicroBT Whatsminer M21S: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT Whatsminer M21 is more profitable at $-3.35/day compared to $-6.05/day for the MicroBT Whatsminer M21S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the MicroBT Whatsminer M21 or MicroBT Whatsminer M21S?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the MicroBT Whatsminer M21 or MicroBT Whatsminer M21S?
The MicroBT Whatsminer M21 scores 28/100 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 MicroBT Whatsminer M21 and MicroBT Whatsminer M21S on J/TH?
The MicroBT Whatsminer M21 runs at 60.0 J/TH while the MicroBT Whatsminer M21S runs at 60.0 J/TH — a difference of 0.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.