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Bitmain Antminer S21 Pro vs Canaan Avalon A15 Pro

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 A15 Pro3.9

Canaan's answer to the Antminer S21 Pro: the same 15.0 J/TH efficiency at 221 TH/s, usually a few hundred dollars cheaper.

No verdict

No verdict: both run at 15.0 J/TH, so the rows below decide by price per terahash, noise and cooling.

Criterion
Efficiency (J/TH, lower is better)
Bitmain Antminer S21 Pro
15.0 J/TH
Canaan Avalon A15 Pro
15.0 J/TH

Bitmain Antminer S21 Pro and Canaan Avalon A15 Pro, 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 A15 Pro compared fact by fact from their reviews; a check marks the side a decidable criterion favours.
FactBitmain Antminer S21 ProCanaan Avalon A15 Pro
Efficiency15.0 J/TH15.0 J/TH
Editorial rating4.03.9
Hashrate220-245 TH/s (234 TH/s typical)221 TH/s
Power draw3,510 W3,315 W
Street price$3,800 to $5,500$3,500 to $4,800
Price per TH/s (midpoint)$19.87$18.78 (favoured on this row)
CoolingAirAir
Noise75 dB75 dB
ReleasedOctober 20242025
Made byBitmainCanaan
Best forMost buyers: the strongest balance of price, hashrate and efficiency in an air-cooled unitBuyers who want a third major manufacturer with competitive specs at a fair price
Last reviewed2026-08-182026-08-18

Frequently asked questions

Is Bitmain Antminer S21 Pro or Canaan Avalon A15 Pro more efficient?

No verdict: both run at 15.0 J/TH, so the rows below decide by price per terahash, noise and cooling. 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 A15 Pro?

Canaan Avalon A15 Pro, at $18.78 per TH/s against $19.87, on the midpoint of each street-price band (Bitmain Antminer S21 Pro $3,800 to $5,500, Canaan Avalon A15 Pro $3,500 to $4,800) 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 A15 Pro?

Bitmain Antminer S21 Pro: 75 dB, air cooling. Canaan Avalon A15 Pro: 75 dB, air 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 A15 Pro?

Canaan Avalon A15 Pro, released 2025, against October 2024 for Bitmain Antminer S21 Pro.

The full reviews: Bitmain Antminer S21 Pro and Canaan Avalon A15 Pro, each with its sources, and every miner we review.

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