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Fluminer T3 vs MicroBT Whatsminer M66S+

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

MicroBT Whatsminer M66S+3.5

A water-cooled workhorse for the farm hedging against Bitmain: 318 TH/s at 16.5 J/TH on universal 100-240V input, with no three-phase upgrade required.

Verdict: Fluminer T3

Fluminer T3 is the more efficient machine: 14.8 J/TH against 16.5 J/TH for MicroBT Whatsminer M66S+, on the rated watts and nominal hashrate each maker publishes.

Criterion
Efficiency (J/TH, lower is better)
Fluminer T3
14.8 J/TH
MicroBT Whatsminer M66S+
16.5 J/TH

Fluminer T3 and MicroBT Whatsminer M66S+, 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.

Fluminer T3 and MicroBT Whatsminer M66S+ compared fact by fact from their reviews; a check marks the side a decidable criterion favours.
FactFluminer T3MicroBT Whatsminer M66S+
Efficiency14.8 J/TH (favoured on this row)16.5 J/TH
Editorial rating3.03.5
Hashrate115 TH/s318 TH/s
Power draw1,700 W5,247 W
Street price$1,800 to $2,500$8,000 to $10,500
Price per TH/s (midpoint)$18.70 (favoured on this row)$29.09
CoolingAirHydro (liquid loop)
Noise40-55 dBLow, water loop only
ReleasedJuly 20252025
Made byFluminerMicroBT
Best forApartment and home miners who want real hashrate without lawnmower noiseFarms that want a hydro Bitmain alternative on standard 100-240V power
Last reviewed2026-08-182026-08-18

Frequently asked questions

Is Fluminer T3 or MicroBT Whatsminer M66S+ more efficient?

Fluminer T3 is the more efficient machine: 14.8 J/TH against 16.5 J/TH for MicroBT Whatsminer M66S+, 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, Fluminer T3 or MicroBT Whatsminer M66S+?

Fluminer T3, at $18.70 per TH/s against $29.09, on the midpoint of each street-price band (Fluminer T3 $1,800 to $2,500, MicroBT Whatsminer M66S+ $8,000 to $10,500) as of the review dates. A cheaper terahash that burns more power costs more over a year at most electricity prices.

Which is quieter, Fluminer T3 or MicroBT Whatsminer M66S+?

Fluminer T3: 40-55 dB, air cooling. MicroBT Whatsminer M66S+: Low, 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, Fluminer T3 or MicroBT Whatsminer M66S+?

Both were released in 2025 (Fluminer T3 in July 2025, MicroBT Whatsminer M66S+ in 2025).

The full reviews: Fluminer T3 and MicroBT Whatsminer M66S+, each with its sources, and every miner we review.

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