MicroBT Whatsminer M21 vs Whatsminer M63S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | Whatsminer M63S |
|---|---|---|
| 31.0 TH/s | Hashrate | 390.0 TH/s |
| 1,860 W | Power Consumption | 7,215 W |
| 60.0 J/TH | Efficiency | 18.5 J/TH |
| — | Noise Level | 50 dB |
| 7,150.0 kg | Weight | 28.0 kg |
| 6,346 BTU/hr | BTU Output | 24,618 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 M63S
Based on BTC price of $78,004 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Whatsminer M63S edges it: 4 of 5 factors go its way (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 1158% more hashrate (31.0 vs 390.0 TH/s). The MicroBT Whatsminer M21 holds the edge in power consumption. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
The MicroBT Whatsminer M21 and Whatsminer M63S diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Whatsminer M63S 1158% more hashrate (31.0 vs 390.0 TH/s)
- MicroBT Whatsminer M21 74% better power draw (1,860 vs 7,215 W)
- Whatsminer M63S 69% better efficiency (60.0 vs 18.5 J/TH)
- Whatsminer M63S 100% better weight (7,150.0 vs 28.0 kg)
- Whatsminer M63S 288% more heat output (6,346 vs 24,618 BTU/hr)
- Whatsminer M63S 57% more home mining score (28.0 vs 44.0)
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 M21 | Metric | Whatsminer M63S |
|---|---|---|
| — | Upfront cost (MSRP) | $12,000 |
| -$3.35 | Daily net profit | -$3.32 |
| -$1,223 | Net after 1 year | -$13,211 |
| -$2,446 | Net after 2 years | -$14,421 |
| -$3,670 | Net after 3 years | -$15,632 |
| — | 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 M63SScore: 44/100. 50 dB noise level.
Best for Efficiency
Whatsminer M63S18.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the MicroBT Whatsminer M21 or Whatsminer M63S more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Whatsminer M63S is more profitable at $-3.32/day compared to $-3.35/day for the MicroBT Whatsminer M21. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
MicroBT Whatsminer M21 vs Whatsminer M63S: which runs at a lower noise level?
The Whatsminer M63S 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.
MicroBT Whatsminer M21 vs Whatsminer M63S: which fits a residential setup better?
The Whatsminer M63S 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.
MicroBT Whatsminer M21 vs Whatsminer M63S: how much does the efficiency gap matter?
The MicroBT Whatsminer M21 runs at 60.0 J/TH while the Whatsminer M63S runs at 18.5 J/TH — a difference of 41.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 69% better efficiency (60.0 vs 18.5 J/TH).