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Bitmain Antminer S21 XP vs Fluminer T3

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.

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

Bitmain Antminer S21 XP is the more efficient machine: 13.5 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
13.5 J/TH
Fluminer T3
14.8 J/TH

Bitmain Antminer S21 XP 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 and Fluminer T3 compared fact by fact from their reviews; a check marks the side a decidable criterion favours.
FactBitmain Antminer S21 XPFluminer T3
Efficiency13.5 J/TH (favoured on this row)14.8 J/TH
Editorial rating4.43.0
Hashrate270 TH/s115 TH/s
Power draw3,645 W1,700 W
Street price$3,800 to $5,500$1,800 to $2,500
Price per TH/s (midpoint)$17.22 (favoured on this row)$18.70
CoolingAirAir
Noise75 dB40-55 dB
ReleasedOctober 2024July 2025
Made byBitmainFluminer
Best forHome and small operations that want flagship efficiency without running a water loopApartment and home miners who want real hashrate without lawnmower noise
Last reviewed2026-08-182026-08-18

Frequently asked questions

Is Bitmain Antminer S21 XP or Fluminer T3 more efficient?

Bitmain Antminer S21 XP is the more efficient machine: 13.5 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 or Fluminer T3?

Bitmain Antminer S21 XP, at $17.22 per TH/s against $18.70, on the midpoint of each street-price band (Bitmain Antminer S21 XP $3,800 to $5,500, 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 or Fluminer T3?

Bitmain Antminer S21 XP: 75 dB, air 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 or Fluminer T3?

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

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

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