Bitmain Antminer S21 XP Immersion

Hashrate 300.0 TH/s Power 4,050 W Efficiency 13.5 J/TH

Bitdeer SealMiner A3 Hydro

Hashrate 500.0 TH/s Power 6,750 W Efficiency 13.5 J/TH

Bitmain Antminer S21 XP Immersion vs Bitdeer SealMiner A3 Hydro

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

Specifications Comparison

Bitmain Antminer S21 XP Immersion	Specification	Bitdeer SealMiner A3 Hydro
300.0 TH/s	Hashrate	500.0 TH/s
4,050 W	Power Consumption	6,750 W
13.5 J/TH	Efficiency	13.5 J/TH
50 dB	Noise Level	50 dB
14.4 kg	Weight	20.5 kg
13,819 BTU/hr	BTU Output	23,031 BTU/hr
44/100	Home Mining Score	44/100
—	Release Year	—
SHA-256	Algorithm	SHA-256
Bitmain	Manufacturer	Bitdeer

Profitability Comparison

Electricity Rate:

$/kWh

Bitmain Antminer S21 XP Immersion

Daily Revenue 0.00013909 BTC $10.77

Daily Electricity -$9.72

Daily Profit $1.05

Monthly $31.61

Yearly $384.60

Bitdeer SealMiner A3 Hydro

Daily Revenue 0.00023181 BTC $17.96

Daily Electricity -$16.20

Daily Profit $1.76

Monthly $52.69

Yearly $641.00

Based on BTC price of $77,461 and current network difficulty as of Apr 25, 2026. Actual results vary.

Verdict

Based on our multi-factor analysis, the Bitmain Antminer S21 XP Immersion wins on 2 of 3 factors (power consumption, price-performance). The Bitdeer SealMiner A3 Hydro holds the edge in hashrate. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.

Winner: Bitmain Antminer S21 XP Immersion — wins on 2 of 3 factors

Best For...

Best for Profitability

Bitdeer SealMiner A3 Hydro

$0.70/day higher profit at current rates.

Best for Home Mining

Tie

Both miners are equally suitable for home use.

Best for Efficiency

Tie

Both miners have comparable efficiency.

Frequently Asked Questions

Is the Bitmain Antminer S21 XP Immersion or Bitdeer SealMiner A3 Hydro more profitable?

At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A3 Hydro is more profitable at $1.76/day compared to $1.05/day for the Bitmain Antminer S21 XP Immersion. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Which is quieter, the Bitmain Antminer S21 XP Immersion or Bitdeer SealMiner A3 Hydro?

Both miners have similar noise levels. Check the specs table above for exact decibel readings.

Which is better for home mining, the Bitmain Antminer S21 XP Immersion or Bitdeer SealMiner A3 Hydro?

Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.

What is the efficiency difference between Bitmain Antminer S21 XP Immersion and Bitdeer SealMiner A3 Hydro?

The Bitmain Antminer S21 XP Immersion runs at 13.5 J/TH while the Bitdeer SealMiner A3 Hydro runs at 13.5 J/TH — a difference of 0.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.

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