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Bitmain Antminer S21 XP Hyd vs Fluminer T3

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

Fluminer T33.0

Quiet enough for an apartment at 40-55 dB, the Fluminer T3 puts 115 TH/s on an ordinary household outlet drawing 1700 W.

Verdict: Bitmain Antminer S21 XP Hyd

Bitmain Antminer S21 XP Hyd is the more efficient machine: 12.0 J/TH against 14.8 J/TH for Fluminer T3, on the rated watts and nominal hashrate each maker publishes.

Criterion
Efficiency (J/TH, lower is better)
Bitmain Antminer S21 XP Hyd
12.0 J/TH
Fluminer T3
14.8 J/TH

Bitmain Antminer S21 XP Hyd and Fluminer T3, 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 Hyd and Fluminer T3 compared fact by fact from their reviews; a check marks the side a decidable criterion favours.
FactBitmain Antminer S21 XP HydFluminer T3
Efficiency12.0 J/TH (favoured on this row)14.8 J/TH
Editorial rating4.13.0
Hashrate473 TH/s115 TH/s
Power draw5,676 W1,700 W
Street price$7,700 to $11,000$1,800 to $2,500
Price per TH/s (midpoint)$19.77$18.70 (favoured on this row)
CoolingHydro (liquid loop)Air
NoiseLow, pump and water loop only40-55 dB
ReleasedOctober 2024July 2025
Made byBitmainFluminer
Best forSerious and professional miners with water-cooling infrastructure already in placeApartment and home miners who want real hashrate without lawnmower noise
Last reviewed2026-08-182026-08-18

Frequently asked questions

Is Bitmain Antminer S21 XP Hyd or Fluminer T3 more efficient?

Bitmain Antminer S21 XP Hyd is the more efficient machine: 12.0 J/TH against 14.8 J/TH for Fluminer T3, 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 Hyd or Fluminer T3?

Fluminer T3, at $18.70 per TH/s against $19.77, on the midpoint of each street-price band (Bitmain Antminer S21 XP Hyd $7,700 to $11,000, Fluminer T3 $1,800 to $2,500) as of the review dates. A cheaper terahash that burns more power costs more over a year at most electricity prices.

Which is quieter, Bitmain Antminer S21 XP Hyd or Fluminer T3?

Bitmain Antminer S21 XP Hyd: Low, pump and water loop only, hydro (liquid loop) cooling. Fluminer T3: 40-55 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 XP Hyd or Fluminer T3?

Fluminer T3, released July 2025, against October 2024 for Bitmain Antminer S21 XP Hyd.

The full reviews: Bitmain Antminer S21 XP Hyd and Fluminer T3, each with its sources, and every miner we review.

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