Antminer S21 Pro

Hashrate 234.0 TH/s Power 3,510 W Efficiency 15.0 J/TH

Bitdeer SealMiner A2 Pro Hyd

Hashrate 500.0 TH/s Power 7,450 W Efficiency 14.9 J/TH

Antminer S21 Pro vs Bitdeer SealMiner A2 Pro Hyd

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

Specifications Comparison

Antminer S21 Pro	Specification	Bitdeer SealMiner A2 Pro Hyd
234.0 TH/s	Hashrate	500.0 TH/s
3,510 W	Power Consumption	7,450 W
15.0 J/TH	Efficiency	14.9 J/TH
75 dB	Noise Level	50 dB
15.0 kg	Weight	20.5 kg
11,976 BTU/hr	BTU Output	25,419 BTU/hr
30/100	Home Mining Score	44/100
—	Release Year	—
SHA-256	Algorithm	SHA-256
Bitmain	Manufacturer	Bitdeer

Profitability Comparison

Electricity Rate:

$/kWh

Antminer S21 Pro

Daily Revenue 0.00010142 BTC $7.04

Daily Electricity -$8.42

Daily Profit -$1.39

Monthly -$41.62

Yearly -$506.38

Bitdeer SealMiner A2 Pro Hyd

Daily Revenue 0.00021671 BTC $15.04

Daily Electricity -$17.88

Daily Profit -$2.84

Monthly -$85.33

Yearly -$1,038.21

Based on BTC price of $69,381 and current network difficulty as of Mar 24, 2026. Actual results vary.

Verdict

Based on our multi-factor analysis, the Bitdeer SealMiner A2 Pro Hyd wins on 5 of 6 factors (efficiency, hashrate, home mining score, noise level, price-performance). The Antminer S21 Pro holds the edge in power consumption. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.

Winner: Bitdeer SealMiner A2 Pro Hyd — wins on 5 of 6 factors

Best For...

Best for Profitability

Tie

Both miners produce similar daily profit.

Best for Home Mining

Bitdeer SealMiner A2 Pro Hyd

Score: 44/100. 50 dB noise level.

Best for Efficiency

Bitdeer SealMiner A2 Pro Hyd

14.9 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Is the Antminer S21 Pro or Bitdeer SealMiner A2 Pro Hyd more profitable?

At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 Pro is more profitable at $-1.39/day compared to $-2.84/day for the Bitdeer SealMiner A2 Pro Hyd. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Which is quieter, the Antminer S21 Pro or Bitdeer SealMiner A2 Pro Hyd?

The Bitdeer SealMiner A2 Pro Hyd is quieter at 50 dB compared to the Antminer S21 Pro at 75 dB. For home mining, lower noise levels make a significant difference in livability.

Which is better for home mining, the Antminer S21 Pro or Bitdeer SealMiner A2 Pro Hyd?

The Bitdeer SealMiner A2 Pro Hyd scores 44/100 on our Home Mining Score (vs 30/100 for the Antminer S21 Pro). 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 Antminer S21 Pro and Bitdeer SealMiner A2 Pro Hyd?

The Antminer S21 Pro runs at 15.0 J/TH while the Bitdeer SealMiner A2 Pro Hyd runs at 14.9 J/TH — a difference of 0.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.

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