MicroBT Whatsminer M21 vs Whatsminer M63
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | Whatsminer M63 |
|---|---|---|
| 31.0 TH/s | Hashrate | 360.0 TH/s |
| 1,860 W | Power Consumption | 7,200 W |
| 60.0 J/TH | Efficiency | 20.0 J/TH |
| — | Noise Level | 50 dB |
| 7,150.0 kg | Weight | 27.5 kg |
| 6,346 BTU/hr | BTU Output | 24,566 BTU/hr |
| 28/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21
Whatsminer M63
Based on BTC price of $76,908 and current network difficulty as of May 18, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Whatsminer M63 comes out ahead — it takes 4 of 5 (efficiency, hashrate, home mining score, noise level). Its biggest concrete edge: 1061% more hashrate (31.0 vs 360.0 TH/s). The MicroBT Whatsminer M21 holds the edge in power consumption. Cross-check the spec deltas and operating-cost table above against your own electricity rate before deciding.
Spec Deltas
The MicroBT Whatsminer M21 and Whatsminer M63 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Whatsminer M63 1061% more hashrate (31.0 vs 360.0 TH/s)
- MicroBT Whatsminer M21 74% better power draw (1,860 vs 7,200 W)
- Whatsminer M63 67% better efficiency (60.0 vs 20.0 J/TH)
- Whatsminer M63 100% better weight (7,150.0 vs 27.5 kg)
- Whatsminer M63 287% more heat output (6,346 vs 24,566 BTU/hr)
- Whatsminer M63 57% more home mining score (28.0 vs 44.0)
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 M21 | Metric | Whatsminer M63 |
|---|---|---|
| — | Upfront cost (MSRP) | $11,000 |
| -$3.37 | Daily net profit | -$4.54 |
| -$1,229 | Net after 1 year | -$12,657 |
| -$2,458 | Net after 2 years | -$14,313 |
| -$3,687 | Net after 3 years | -$15,970 |
| — | 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
Whatsminer M63Score: 44/100. 50 dB noise level.
Best for Efficiency
Whatsminer M6320.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the MicroBT Whatsminer M21 or Whatsminer M63 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT Whatsminer M21 is more profitable at $-3.37/day compared to $-4.54/day for the Whatsminer M63. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
MicroBT Whatsminer M21 vs Whatsminer M63: which runs at a lower noise level?
The Whatsminer M63 is quieter at 50 dB compared to the MicroBT Whatsminer M21 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the MicroBT Whatsminer M21 or Whatsminer M63?
The Whatsminer M63 scores 44/100 on our Home Mining Score (vs 28/100 for the MicroBT Whatsminer M21). 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 M21 and Whatsminer M63 on J/TH?
The MicroBT Whatsminer M21 runs at 60.0 J/TH while the Whatsminer M63 runs at 20.0 J/TH — a difference of 40.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 67% better efficiency (60.0 vs 20.0 J/TH).