MicroBT Whatsminer M21 vs MicroBT Whatsminer M31S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | MicroBT Whatsminer M31S |
|---|---|---|
| 31.0 TH/s | Hashrate | 76.0 TH/s |
| 1,860 W | Power Consumption | 3,220 W |
| 60.0 J/TH | Efficiency | 42.4 J/TH |
| — | Noise Level | — |
| 7,150.0 kg | Weight | 12,500.0 kg |
| 6,346 BTU/hr | BTU Output | 10,987 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 M31S
Based on BTC price of $74,054 and current network difficulty as of Mar 17, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT Whatsminer M31S wins on 2 of 4 factors (efficiency, hashrate). The MicroBT Whatsminer M21 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
MicroBT Whatsminer M21Score: 28/100. 0 dB noise level.
Best for Efficiency
MicroBT Whatsminer M31S42.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the MicroBT Whatsminer M21 or MicroBT Whatsminer M31S more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT Whatsminer M21 is more profitable at $-3.47/day compared to $-5.29/day for the MicroBT Whatsminer M31S. 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 M31S?
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 M31S?
The MicroBT Whatsminer M21 scores 28/100 on our Home Mining Score (vs 22/100 for the MicroBT Whatsminer M31S). 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 MicroBT Whatsminer M21 and MicroBT Whatsminer M31S?
The MicroBT Whatsminer M21 runs at 60.0 J/TH while the MicroBT Whatsminer M31S runs at 42.4 J/TH — a difference of 17.6 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.