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Bitmain Antminer S21 Pro vs Canaan Avalon Nano 3S

Comparing
two miners
Decided by
Efficiency (J/TH, lower is better)
Last reviewed
2026-08-18
Bitmain Antminer S21 Pro4.0

The default pick for buyers with cheap power: 234 TH/s air-cooled at 15 J/TH, and roughly $16 to $24 per terahash as of August 2026.

Canaan Avalon Nano 3S3.4

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.

Verdict: Bitmain Antminer S21 Pro

Bitmain Antminer S21 Pro is the more efficient machine: 15.0 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)
Bitmain Antminer S21 Pro
15.0 J/TH
Canaan Avalon Nano 3S
23.3 J/TH

Bitmain Antminer S21 Pro and Canaan Avalon Nano 3S, 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.

Bitmain Antminer S21 Pro and Canaan Avalon Nano 3S compared fact by fact from their reviews; a check marks the side a decidable criterion favours.
FactBitmain Antminer S21 ProCanaan Avalon Nano 3S
Efficiency15.0 J/TH (favoured on this row)23.3 J/TH
Editorial rating4.03.4
Hashrate220-245 TH/s (234 TH/s typical)6.0 TH/s
Power draw3,510 W140 W
Street price$3,800 to $5,500$200 to $300
Price per TH/s (midpoint)$19.87 (favoured on this row)$41.67
CoolingAirPassive / small fan
Noise75 dBAbout 45 dB
ReleasedOctober 20242025
Made byBitmainCanaan
Best forMost buyers: the strongest balance of price, hashrate and efficiency in an air-cooled unitHobbyists who want a silent desk miner to learn on, not a profit machine
Last reviewed2026-08-182026-08-18

Frequently asked questions

Is Bitmain Antminer S21 Pro or Canaan Avalon Nano 3S more efficient?

Bitmain Antminer S21 Pro is the more efficient machine: 15.0 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, Bitmain Antminer S21 Pro or Canaan Avalon Nano 3S?

Bitmain Antminer S21 Pro, at $19.87 per TH/s against $41.67, on the midpoint of each street-price band (Bitmain Antminer S21 Pro $3,800 to $5,500, Canaan Avalon Nano 3S $200 to $300) as of the review dates. A cheaper terahash that burns more power costs more over a year at most electricity prices.

Which is quieter, Bitmain Antminer S21 Pro or Canaan Avalon Nano 3S?

Bitmain Antminer S21 Pro: 75 dB, air cooling. Canaan Avalon Nano 3S: About 45 dB, passive / small fan cooling. Neither belongs in a room people use; the mining hub covers where each can actually run.

Which is newer, Bitmain Antminer S21 Pro or Canaan Avalon Nano 3S?

Canaan Avalon Nano 3S, released 2025, against October 2024 for Bitmain Antminer S21 Pro.

The full reviews: Bitmain Antminer S21 Pro and Canaan Avalon Nano 3S, each with its sources, and every miner we review.

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