Avalon A1366 vs MicroBT Whatsminer M21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Avalon A1366 | Specification | MicroBT Whatsminer M21 |
|---|---|---|
| 130.0 TH/s | Hashrate | 31.0 TH/s |
| 3,250 W | Power Consumption | 1,860 W |
| 25.0 J/TH | Efficiency | 60.0 J/TH |
| 75 dB | Noise Level | — |
| 12.6 kg | Weight | 7,150.0 kg |
| 11,089 BTU/hr | BTU Output | 6,346 BTU/hr |
| 36/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Canaan | Manufacturer | MicroBT |
Profitability Comparison
Avalon A1366
MicroBT Whatsminer M21
Based on BTC price of $77,962 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Avalon A1366, which leads on 4 of 5 weighted factors (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 319% more hashrate (130.0 vs 31.0 TH/s). That said, the MicroBT Whatsminer M21 isn't beaten everywhere — it still wins power consumption. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Avalon A1366 and MicroBT Whatsminer M21 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Avalon A1366 319% more hashrate (130.0 vs 31.0 TH/s)
- MicroBT Whatsminer M21 43% better power draw (3,250 vs 1,860 W)
- Avalon A1366 58% better efficiency (25.0 vs 60.0 J/TH)
- Avalon A1366 100% better weight (12.6 vs 7,150.0 kg)
- Avalon A1366 75% more heat output (11,089 vs 6,346 BTU/hr)
- Avalon A1366 29% more home mining score (36.0 vs 28.0)
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.
| Avalon A1366 | Metric | MicroBT Whatsminer M21 |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | — |
| -$3.14 | Daily net profit | -$3.35 |
| -$4,645 | Net after 1 year | -$1,223 |
| -$5,789 | Net after 2 years | -$2,447 |
| -$6,934 | 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
Avalon A1366Score: 36/100. 75 dB noise level.
Best for Efficiency
Avalon A136625.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Avalon A1366 vs MicroBT Whatsminer M21: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Avalon A1366 is more profitable at $-3.14/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.
Avalon A1366 vs MicroBT Whatsminer M21: which runs at a lower noise level?
The Avalon A1366 is quieter at 75 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 Avalon A1366 or MicroBT Whatsminer M21?
The Avalon A1366 scores 36/100 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.
What is the efficiency difference between Avalon A1366 and MicroBT Whatsminer M21?
The Avalon A1366 runs at 25.0 J/TH while the MicroBT Whatsminer M21 runs at 60.0 J/TH — a difference of 35.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 58% better efficiency (25.0 vs 60.0 J/TH).