Canaan AvalonMiner 821 vs MicroBT Whatsminer M3
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Canaan AvalonMiner 821 | Specification | MicroBT Whatsminer M3 |
|---|---|---|
| 11.5 TH/s | Hashrate | 12.0 TH/s |
| 1,200 W | Power Consumption | 2,000 W |
| 104.4 J/TH | Efficiency | 166.7 J/TH |
| — | Noise Level | — |
| 4,700.0 kg | Weight | 8,100.0 kg |
| 4,094 BTU/hr | BTU Output | 6,824 BTU/hr |
| 31/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Canaan | Manufacturer | MicroBT |
Profitability Comparison
Canaan AvalonMiner 821
MicroBT Whatsminer M3
Based on BTC price of $79,096 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Canaan AvalonMiner 821, which leads on 3 of 4 weighted factors (efficiency, power consumption, home mining score). Where it pulls away hardest is 40% better power draw (1,200 vs 2,000 W). That said, the MicroBT Whatsminer M3 isn't beaten everywhere — it still wins hashrate. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Canaan AvalonMiner 821 and MicroBT Whatsminer M3 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- MicroBT Whatsminer M3 4% more hashrate (11.5 vs 12.0 TH/s)
- Canaan AvalonMiner 821 40% better power draw (1,200 vs 2,000 W)
- Canaan AvalonMiner 821 37% better efficiency (104 vs 167 J/TH)
- Canaan AvalonMiner 821 42% better weight (4,700 vs 8,100 kg)
- MicroBT Whatsminer M3 67% more heat output (4,094 vs 6,824 BTU/hr)
- Canaan AvalonMiner 821 11% more home mining score (31.0 vs 28.0)
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.
| Canaan AvalonMiner 821 | Metric | MicroBT Whatsminer M3 |
|---|---|---|
| $699 | Upfront cost (MSRP) | — |
| -$2.46 | Daily net profit | -$4.36 |
| -$1,597 | Net after 1 year | -$1,593 |
| -$2,496 | Net after 2 years | -$3,185 |
| -$3,394 | Net after 3 years | -$4,778 |
| 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
Canaan AvalonMiner 821Score: 31/100. 0 dB noise level.
Best for Efficiency
Canaan AvalonMiner 821104.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Canaan AvalonMiner 821 or MicroBT Whatsminer M3 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Canaan AvalonMiner 821 is more profitable at $-2.46/day compared to $-4.36/day for the MicroBT Whatsminer M3. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Canaan AvalonMiner 821 vs MicroBT Whatsminer M3: which runs at a lower noise level?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Canaan AvalonMiner 821 or MicroBT Whatsminer M3?
The Canaan AvalonMiner 821 scores 31/100 on our Home Mining Score (vs 28/100 for the MicroBT Whatsminer M3). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Canaan AvalonMiner 821 vs MicroBT Whatsminer M3: how much does the efficiency gap matter?
The Canaan AvalonMiner 821 runs at 104.4 J/TH while the MicroBT Whatsminer M3 runs at 166.7 J/TH — a difference of 62.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 37% better efficiency (104 vs 167 J/TH).