MicroBT Whatsminer M20S vs MicroBT Whatsminer M21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M20S | Specification | MicroBT Whatsminer M21 |
|---|---|---|
| 68.0 TH/s | Hashrate | 31.0 TH/s |
| 3,360 W | Power Consumption | 1,860 W |
| 49.4 J/TH | Efficiency | 60.0 J/TH |
| — | Noise Level | — |
| 12,500.0 kg | Weight | 7,150.0 kg |
| 11,464 BTU/hr | BTU Output | 6,346 BTU/hr |
| 22/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M20S
MicroBT Whatsminer M21
Based on BTC price of $77,954 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the MicroBT Whatsminer M20S comes out ahead — it takes 2 of 4 (efficiency, hashrate). Where it pulls away hardest is 119% more hashrate (68.0 vs 31.0 TH/s). The MicroBT Whatsminer M21 claws back ground on power consumption and home mining score. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Stripped to the numbers, this is how far apart the MicroBT Whatsminer M20S and MicroBT Whatsminer M21 sit on each measurable spec:
- MicroBT Whatsminer M20S 119% more hashrate (68.0 vs 31.0 TH/s)
- MicroBT Whatsminer M21 45% better power draw (3,360 vs 1,860 W)
- MicroBT Whatsminer M20S 18% better efficiency (49.4 vs 60.0 J/TH)
- MicroBT Whatsminer M21 43% better weight (12,500 vs 7,150 kg)
- MicroBT Whatsminer M20S 81% more heat output (11,464 vs 6,346 BTU/hr)
- MicroBT Whatsminer M21 27% more home mining score (22.0 vs 28.0)
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 M20S | Metric | MicroBT Whatsminer M21 |
|---|---|---|
| $66 | Upfront cost (MSRP) | — |
| -$5.62 | Daily net profit | -$3.35 |
| -$2,119 | Net after 1 year | -$1,223 |
| -$4,172 | Net after 2 years | -$2,447 |
| -$6,225 | Net after 3 years | -$3,670 |
| Does not pay back at current rates (negative daily profit) | Payback period | — |
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
MicroBT Whatsminer M20S49.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the MicroBT Whatsminer M20S or the MicroBT Whatsminer M21?
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 $-5.62/day for the MicroBT Whatsminer M20S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
MicroBT Whatsminer M20S vs MicroBT Whatsminer M21: which runs at a lower noise level?
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 M21?
The MicroBT Whatsminer M21 scores 28/100 on our Home Mining Score (vs 22/100 for the MicroBT Whatsminer M20S). 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 M20S and MicroBT Whatsminer M21 on J/TH?
The MicroBT Whatsminer M20S runs at 49.4 J/TH while the MicroBT Whatsminer M21 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).