MicroBT Whatsminer M21S vs MicroBT Whatsminer M31S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21S | Specification | MicroBT Whatsminer M31S |
|---|---|---|
| 56.0 TH/s | Taux de hachage | 76.0 TH/s |
| 3,360 W | Consommation électrique | 3,220 W |
| 60.0 J/TH | Efficiency | 42.4 J/TH |
| — | Niveau de bruit | — |
| 12.5 kg | Weight | 12.5 kg |
| 11,464 BTU/hr | BTU Output | 10,987 BTU/hr |
| 22/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21S
MicroBT Whatsminer M31S
Based on BTC price of $64,340 and current network difficulty as of Jun 4, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the MicroBT Whatsminer M31S edges it: 4 of 4 factors go its way (efficacité, hashrate, consommation électrique, rapport qualité-prix). Where it pulls away hardest is 29% better efficacité (60.0 vs 42.4 J/TH). The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Here is every spec where the MicroBT Whatsminer M21S and MicroBT Whatsminer M31S actually differ, with the gap quantified:
- MicroBT Whatsminer M31S 36% more hashrate (56.0 vs 76.0 TH/s)
- MicroBT Whatsminer M31S 4% better power draw (3,360 vs 3,220 W)
- MicroBT Whatsminer M31S 29% better efficacité (60.0 vs 42.4 J/TH)
- MicroBT Whatsminer M21S 4% more heat output (11,464 vs 10,987 BTU/hr)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| MicroBT Whatsminer M21S | Metric | MicroBT Whatsminer M31S |
|---|---|---|
| $650 | Upfront cost (MSRP) | $91 |
| -$6.43 | Daily net profit | -$5.52 |
| -$2,998 | Net after 1 year | -$2,104 |
| -$5,347 | Net after 2 years | -$4,118 |
| -$7,695 | Net after 3 years | -$6,131 |
| 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
TieBoth miners are equally suitable for home use.
Best for Efficiency
MicroBT Whatsminer M31S42.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the MicroBT Whatsminer M21S or the MicroBT Whatsminer M31S?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT Whatsminer M31S is more profitable at $-5.52/day compared to $-6.43/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 M21S or MicroBT Whatsminer M31S?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
MicroBT Whatsminer M21S vs MicroBT Whatsminer M31S: which fits a residential setup better?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
What is the efficiency difference between MicroBT Whatsminer M21S and MicroBT Whatsminer M31S?
The MicroBT Whatsminer M21S 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. In relative terms that is 29% better efficacité (60.0 vs 42.4 J/TH).