MicroBT Whatsminer M20S vs MicroBT Whatsminer M21S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M20S | Specification | MicroBT Whatsminer M21S |
|---|---|---|
| 68.0 TH/s | Hashrate | 56.0 TH/s |
| 3,360 W | Power Consumption | 3,360 W |
| 49.4 J/TH | Efficiency | 60.0 J/TH |
| — | Noise Level | — |
| 12,500.0 kg | Weight | 12,500.0 kg |
| 11,464 BTU/hr | BTU Output | 11,464 BTU/hr |
| 22/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M20S
MicroBT Whatsminer M21S
Based on BTC price of $78,139 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the MicroBT Whatsminer M20S, which leads on 3 of 3 weighted factors (efficiency, hashrate, price-performance). Where it pulls away hardest is 18% better efficiency (49.4 vs 60.0 J/TH). Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the MicroBT Whatsminer M20S and MicroBT Whatsminer M21S sit on each measurable spec:
- MicroBT Whatsminer M20S 21% more hashrate (68.0 vs 56.0 TH/s)
- MicroBT Whatsminer M20S 18% better efficiency (49.4 vs 60.0 J/TH)
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.
| MicroBT Whatsminer M20S | Metric | MicroBT Whatsminer M21S |
|---|---|---|
| $66 | Upfront cost (MSRP) | $650 |
| -$5.62 | Daily net profit | -$6.05 |
| -$2,117 | Net after 1 year | -$2,858 |
| -$4,168 | Net after 2 years | -$5,067 |
| -$6,219 | Net after 3 years | -$7,275 |
| 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 M20S49.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
MicroBT Whatsminer M20S 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 M20S is more profitable at $-5.62/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 M20S or MicroBT Whatsminer M21S?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
For mining at home, should I pick the MicroBT Whatsminer M20S or the MicroBT Whatsminer M21S?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
MicroBT Whatsminer M20S vs MicroBT Whatsminer M21S: how much does the efficiency gap matter?
The MicroBT Whatsminer M20S runs at 49.4 J/TH while the MicroBT Whatsminer M21S runs at 60.0 J/TH — a difference of 10.6 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 18% better efficiency (49.4 vs 60.0 J/TH).