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Bitmain Antminer S21 XP vs Bitmain Antminer S21 XP Hyd

Comparing
two miners
Decided by
Efficiency (J/TH, lower is better)
Last reviewed
2026-08-18
Bitmain Antminer S21 XP4.4

Bitmain's most efficient air-cooled miner: 270 TH/s at 13.5 J/TH, about 10 percent less power per terahash than the next tier of fan-cooled rigs.

Bitmain Antminer S21 XP Hyd4.1

A 473 TH/s hydro miner that demands plumbing, a dry cooler, and a 240V circuit before it earns a single satoshi.

Verdict: Bitmain Antminer S21 XP Hyd

Bitmain Antminer S21 XP Hyd is the more efficient machine: 12.0 J/TH against 13.5 J/TH for Bitmain Antminer S21 XP, on the rated watts and nominal hashrate each maker publishes.

Criterion
Efficiency (J/TH, lower is better)
Bitmain Antminer S21 XP
13.5 J/TH
Bitmain Antminer S21 XP Hyd
12.0 J/TH

Bitmain Antminer S21 XP and Bitmain Antminer S21 XP Hyd, 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 XP and Bitmain Antminer S21 XP Hyd compared fact by fact from their reviews; a check marks the side a decidable criterion favours.
FactBitmain Antminer S21 XPBitmain Antminer S21 XP Hyd
Efficiency13.5 J/TH12.0 J/TH (favoured on this row)
Editorial rating4.44.1
Hashrate270 TH/s473 TH/s
Power draw3,645 W5,676 W
Street price$3,800 to $5,500$7,700 to $11,000
Price per TH/s (midpoint)$17.22 (favoured on this row)$19.77
CoolingAirHydro (liquid loop)
Noise75 dBLow, pump and water loop only
ReleasedOctober 2024October 2024
Made byBitmainBitmain
Best forHome and small operations that want flagship efficiency without running a water loopSerious and professional miners with water-cooling infrastructure already in place
Last reviewed2026-08-182026-08-18

Frequently asked questions

Is Bitmain Antminer S21 XP or Bitmain Antminer S21 XP Hyd more efficient?

Bitmain Antminer S21 XP Hyd is the more efficient machine: 12.0 J/TH against 13.5 J/TH for Bitmain Antminer S21 XP, 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 XP or Bitmain Antminer S21 XP Hyd?

Bitmain Antminer S21 XP, at $17.22 per TH/s against $19.77, on the midpoint of each street-price band (Bitmain Antminer S21 XP $3,800 to $5,500, Bitmain Antminer S21 XP Hyd $7,700 to $11,000) 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 XP or Bitmain Antminer S21 XP Hyd?

Bitmain Antminer S21 XP: 75 dB, air cooling. Bitmain Antminer S21 XP Hyd: Low, pump and 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, Bitmain Antminer S21 XP or Bitmain Antminer S21 XP Hyd?

Both were released in 2024 (Bitmain Antminer S21 XP in October 2024, Bitmain Antminer S21 XP Hyd in October 2024).

The full reviews: Bitmain Antminer S21 XP and Bitmain Antminer S21 XP Hyd, each with its sources, and every miner we review.

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