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Antminer S21+

Antminer S21+

Hashrate 216.0 TH/s Power 3,564 W Efficiency 16.5 J/TH
VS
Bitdeer SealMiner A2 Hyd

Bitdeer SealMiner A2 Hyd

Hashrate 446.0 TH/s Power 7,360 W Efficiency 16.5 J/TH

Antminer S21+ vs Bitdeer SealMiner A2 Hyd

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

Specifications Comparison

Antminer S21+ Specification Bitdeer SealMiner A2 Hyd
216.0 TH/s Hashrate 446.0 TH/s
3,564 W Power Consumption 7,360 W
16.5 J/TH Efficiency 16.5 J/TH
75 dB Noise Level 50 dB
15.0 kg Weight 20.5 kg
12,160 BTU/hr BTU Output 25,112 BTU/hr
30/100 Home Mining Score 44/100
— Release Year —
SHA-256 Algorithm SHA-256
Bitmain Manufacturer Bitdeer

Profitability Comparison

$/kWh

Antminer S21+

Daily Revenue 0.00010014 BTC $7.76
Daily Electricity -$8.55
Daily Profit -$0.79
Monthly -$23.72
Yearly -$288.54

Bitdeer SealMiner A2 Hyd

Daily Revenue 0.00020677 BTC $16.03
Daily Electricity -$17.66
Daily Profit -$1.63
Monthly -$49.04
Yearly -$596.66

Based on BTC price of $77,521 and current network difficulty as of Apr 25, 2026. Actual results vary.

Verdict

Based on our multi-factor analysis, the Bitdeer SealMiner A2 Hyd wins on 4 of 5 factors (hashrate, home mining score, noise level, price-performance). The Antminer S21+ 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 Hyd — wins on 4 of 5 factors

Best For...

Best for Profitability

Tie

Both miners produce similar daily profit.

Best for Home Mining

Bitdeer SealMiner A2 Hyd

Score: 44/100. 50 dB noise level.

Best for Efficiency

Tie

Both miners have comparable efficiency.

Frequently Asked Questions

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

At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21+ is more profitable at $-0.79/day compared to $-1.63/day for the Bitdeer SealMiner A2 Hyd. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

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

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

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

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

The Antminer S21+ runs at 16.5 J/TH while the Bitdeer SealMiner A2 Hyd runs at 16.5 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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Compare Bitdeer SealMiner A2 Hyd with...

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