Bitmain Antminer S21+ Hyd vs Bitdeer SealMiner A2
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21+ Hyd | Specification | Bitdeer SealMiner A2 |
|---|---|---|
| 319.0 TH/s | Hashrate | 226.0 TH/s |
| 4,785 W | Power Consumption | 3,730 W |
| 15.0 J/TH | Efficiency | 16.5 J/TH |
| 50 dB | Noise Level | 75 dB |
| 17.5 kg | Weight | 15.5 kg |
| 16,326 BTU/hr | BTU Output | 12,727 BTU/hr |
| 44/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Bitmain Antminer S21+ Hyd
Bitdeer SealMiner A2
Based on BTC price of $78,048 and current network difficulty as of Apr 26, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitmain Antminer S21+ Hyd wins on 5 of 6 factors (efficiency, hashrate, home mining score, noise level, price-performance). The Bitdeer SealMiner A2 holds the edge in power consumption. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
Bitmain Antminer S21+ Hyd$0.83/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21+ HydScore: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S21+ Hyd15.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21+ Hyd or Bitdeer SealMiner A2 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21+ Hyd is more profitable at $0.06/day compared to $-0.77/day for the Bitdeer SealMiner A2. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21+ Hyd or Bitdeer SealMiner A2?
The Bitmain Antminer S21+ Hyd is quieter at 50 dB compared to the Bitdeer SealMiner A2 at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S21+ Hyd or Bitdeer SealMiner A2?
The Bitmain Antminer S21+ Hyd scores 44/100 on our Home Mining Score (vs 30/100 for the Bitdeer SealMiner A2). 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 Bitmain Antminer S21+ Hyd and Bitdeer SealMiner A2?
The Bitmain Antminer S21+ Hyd runs at 15.0 J/TH while the Bitdeer SealMiner A2 runs at 16.5 J/TH — a difference of 1.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.
Compare Bitmain Antminer S21+ Hyd with...
Compare Bitdeer SealMiner A2 with...
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A2 Hyd
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A2 Pro Air
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A2 Pro Hyd
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A3 Air
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A3 Hydro
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A3 Pro Air