Bitdeer SealMiner A2 Pro Air

Hashrate 255.0 TH/s Power 3,790 W Efficiency 14.9 J/TH

Whatsminer M66S

Hashrate 298.0 TH/s Power 5,518 W Efficiency 18.5 J/TH

Bitdeer SealMiner A2 Pro Air vs Whatsminer M66S

Side-by-side specs, profitability, and home mining comparison.

Specifications Comparison

Bitdeer SealMiner A2 Pro Air	Specification	Whatsminer M66S
255.0 TH/s	Hashrate	298.0 TH/s
3,790 W	Power Consumption	5,518 W
14.9 J/TH	Efficiency	18.5 J/TH
75 dB	Noise Level	50 dB
15.5 kg	Weight	13.5 kg
12,932 BTU/hr	BTU Output	18,827 BTU/hr
30/100	Home Mining Score	44/100
—	Release Year	—
SHA-256	Algorithm	SHA-256
Bitdeer	Manufacturer	MicroBT

Profitability Comparison

Electricity Rate:

$/kWh

Bitdeer SealMiner A2 Pro Air

Daily Revenue 0.00011052 BTC $8.20

Daily Electricity -$9.10

Daily Profit -$0.90

Monthly -$26.93

Yearly -$327.65

Whatsminer M66S

Daily Revenue 0.00012916 BTC $9.58

Daily Electricity -$13.24

Daily Profit -$3.66

Monthly -$109.87

Yearly -$1,336.78

Based on BTC price of $74,178 and current network difficulty as of Mar 16, 2026. Actual results vary.

Verdict

Based on specs, the Bitdeer SealMiner A2 Pro Air offers 20% better efficiency at 14.9 J/TH compared to the Whatsminer M66S at 18.5 J/TH. This directly impacts daily operating costs and long-term profitability.

Best For...

Best for Profitability

Tie

Both miners produce similar daily profit.

Best for Home Mining

Whatsminer M66S

Score: 44/100. 50 dB noise level.

Best for Efficiency

Bitdeer SealMiner A2 Pro Air

14.9 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Is the Bitdeer SealMiner A2 Pro Air or Whatsminer M66S more profitable?

At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A2 Pro Air is more profitable at $-0.90/day compared to $-3.66/day for the Whatsminer M66S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Which is quieter, the Bitdeer SealMiner A2 Pro Air or Whatsminer M66S?

The Whatsminer M66S is quieter at 50 dB compared to the Bitdeer SealMiner A2 Pro Air at 75 dB. For home mining, lower noise levels make a significant difference in livability.

Which is better for home mining, the Bitdeer SealMiner A2 Pro Air or Whatsminer M66S?

The Whatsminer M66S scores 44/100 on our Home Mining Score (vs 30/100 for the Bitdeer SealMiner A2 Pro Air). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.

What is the efficiency difference between Bitdeer SealMiner A2 Pro Air and Whatsminer M66S?

The Bitdeer SealMiner A2 Pro Air runs at 14.9 J/TH while the Whatsminer M66S runs at 18.5 J/TH — a difference of 3.7 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.

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