MicroBT Whatsminer M21S vs MicroBT Whatsminer M3X
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21S | Specification | MicroBT Whatsminer M3X |
|---|---|---|
| 56.0 TH/s | Taux de hachage | 12.5 TH/s |
| 3,360 W | Consommation électrique | 2,050 W |
| 60.0 J/TH | Efficiency | 164.0 J/TH |
| — | Niveau de bruit | — |
| 12,500.0 kg | Weight | 7,500.0 kg |
| 11,464 BTU/hr | BTU Output | 6,995 BTU/hr |
| 22/100 | Home Mining Score | 26/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21S
MicroBT Whatsminer M3X
Based on BTC price of $78,130 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the MicroBT Whatsminer M21S, which leads on 3 of 5 weighted factors (efficacité, hashrate, rapport qualité-prix). Its biggest concrete edge: 348% more hashrate (56.0 vs 12.5 TH/s). The MicroBT Whatsminer M3X claws back ground on consommation électrique and score de minage domestique. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the MicroBT Whatsminer M21S and MicroBT Whatsminer M3X actually differ, with the gap quantified:
- MicroBT Whatsminer M21S 348% more hashrate (56.0 vs 12.5 TH/s)
- MicroBT Whatsminer M3X 39% better power draw (3,360 vs 2,050 W)
- MicroBT Whatsminer M21S 63% better efficacité (60.0 vs 164.0 J/TH)
- MicroBT Whatsminer M3X 40% better weight (12,500 vs 7,500 kg)
- MicroBT Whatsminer M21S 64% more heat output (11,464 vs 6,995 BTU/hr)
- MicroBT Whatsminer M3X 18% more score de minage domestique (22.0 vs 26.0)
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 M21S | Metric | MicroBT Whatsminer M3X |
|---|---|---|
| $650 | Upfront cost (MSRP) | $350 |
| -$6.05 | Daily net profit | -$4.47 |
| -$2,858 | Net after 1 year | -$1,982 |
| -$5,067 | Net after 2 years | -$3,614 |
| -$7,275 | Net after 3 years | -$5,245 |
| 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
MicroBT Whatsminer M3XScore: 26/100. 0 dB noise level.
Best for Efficiency
MicroBT Whatsminer M21S60.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
MicroBT Whatsminer M21S vs MicroBT Whatsminer M3X: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT Whatsminer M3X is more profitable at $-4.47/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.
Is the MicroBT Whatsminer M21S or the MicroBT Whatsminer M3X better for noise-sensitive spaces?
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 M21S or the MicroBT Whatsminer M3X?
The MicroBT Whatsminer M3X scores 26/100 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.
MicroBT Whatsminer M21S vs MicroBT Whatsminer M3X: how much does the efficiency gap matter?
The MicroBT Whatsminer M21S runs at 60.0 J/TH while the MicroBT Whatsminer M3X runs at 164.0 J/TH — a difference of 104.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 63% better efficacité (60.0 vs 164.0 J/TH).