Canaan Avalon Nano 3S vs MicroBT Whatsminer M66S+
- Comparing
- two miners
- Decided by
- Efficiency (J/TH, lower is better)
- Last reviewed
- 2026-08-18
A silent desk miner is the promise; at about 45 dB and 140 W, the Avalon Nano 3S mostly keeps it while hashing 6 TH/s for the price of a video game.
A water-cooled workhorse for the farm hedging against Bitmain: 318 TH/s at 16.5 J/TH on universal 100-240V input, with no three-phase upgrade required.
Verdict: MicroBT Whatsminer M66S+
MicroBT Whatsminer M66S+ is the more efficient machine: 16.5 J/TH against 23.3 J/TH for Canaan Avalon Nano 3S, on the rated watts and nominal hashrate each maker publishes.
- Criterion
- Efficiency (J/TH, lower is better)
- Canaan Avalon Nano 3S
- 23.3 J/TH
- MicroBT Whatsminer M66S+
- 16.5 J/TH
Canaan Avalon Nano 3S and MicroBT Whatsminer M66S+, fact by fact
Every row is from the two reviews as of their review dates, with sources on each. A check marks the side a decidable criterion favours; rows without one are information, not a score.
| Fact | Canaan Avalon Nano 3S | MicroBT Whatsminer M66S+ |
|---|---|---|
| Efficiency | 23.3 J/TH | 16.5 J/TH (favoured on this row) |
| Editorial rating | 3.4 | 3.5 |
| Hashrate | 6.0 TH/s | 318 TH/s |
| Power draw | 140 W | 5,247 W |
| Street price | $200 to $300 | $8,000 to $10,500 |
| Price per TH/s (midpoint) | $41.67 | $29.09 (favoured on this row) |
| Cooling | Passive / small fan | Hydro (liquid loop) |
| Noise | About 45 dB | Low, water loop only |
| Released | 2025 | 2025 |
| Made by | Canaan | MicroBT |
| Best for | Hobbyists who want a silent desk miner to learn on, not a profit machine | Farms that want a hydro Bitmain alternative on standard 100-240V power |
| Last reviewed | 2026-08-18 | 2026-08-18 |
Frequently asked questions
Is Canaan Avalon Nano 3S or MicroBT Whatsminer M66S+ more efficient?
MicroBT Whatsminer M66S+ is the more efficient machine: 16.5 J/TH against 23.3 J/TH for Canaan Avalon Nano 3S, on the rated watts and nominal hashrate each maker publishes. Efficiency is derived from the record's rated watts and nominal hashrate and never stored, so it cannot disagree with the numbers beside it.
Which is better value, Canaan Avalon Nano 3S or MicroBT Whatsminer M66S+?
MicroBT Whatsminer M66S+, at $29.09 per TH/s against $41.67, on the midpoint of each street-price band (Canaan Avalon Nano 3S $200 to $300, MicroBT Whatsminer M66S+ $8,000 to $10,500) as of the review dates. A cheaper terahash that burns more power costs more over a year at most electricity prices.
Which is quieter, Canaan Avalon Nano 3S or MicroBT Whatsminer M66S+?
Canaan Avalon Nano 3S: About 45 dB, passive / small fan cooling. MicroBT Whatsminer M66S+: Low, water loop only, hydro (liquid loop) cooling. Neither belongs in a room people use; the mining hub covers where each can actually run.
Which is newer, Canaan Avalon Nano 3S or MicroBT Whatsminer M66S+?
Both were released in 2025 (Canaan Avalon Nano 3S in 2025, MicroBT Whatsminer M66S+ in 2025).
The full reviews: Canaan Avalon Nano 3S and MicroBT Whatsminer M66S+, each with its sources, and every miner we review.
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