Bitmain Antminer S21 (200Th) vs Bitdeer SealMiner A2 Pro Hyd
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 (200Th) | Specification | Bitdeer SealMiner A2 Pro Hyd |
|---|---|---|
| 200.0 TH/s | Hashrate | 500.0 TH/s |
| 3,550 W | Power Consumption | 7,450 W |
| 17.8 J/TH | Efficiency | 14.9 J/TH |
| — | Noise Level | 50 dB |
| 14.2 kg | Weight | 20.5 kg |
| 12,113 BTU/hr | BTU Output | 25,419 BTU/hr |
| 16/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Bitmain Antminer S21 (200Th)
Bitdeer SealMiner A2 Pro Hyd
Based on BTC price of $77,862 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitdeer SealMiner A2 Pro Hyd, which leads on 4 of 6 weighted factors (efficiency, hashrate, home mining score, noise level). Its biggest concrete edge: 150% more hashrate (200 vs 500 TH/s). That said, the Bitmain Antminer S21 (200Th) isn't beaten everywhere — it still wins power consumption and price-performance. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Bitmain Antminer S21 (200Th) and Bitdeer SealMiner A2 Pro Hyd actually differ, with the gap quantified:
- Bitdeer SealMiner A2 Pro Hyd 150% more hashrate (200 vs 500 TH/s)
- Bitmain Antminer S21 (200Th) 52% better power draw (3,550 vs 7,450 W)
- Bitdeer SealMiner A2 Pro Hyd 16% better efficiency (17.8 vs 14.9 J/TH)
- Bitmain Antminer S21 (200Th) 31% better weight (14.2 vs 20.5 kg)
- Bitdeer SealMiner A2 Pro Hyd 110% more heat output (12,113 vs 25,419 BTU/hr)
- Bitdeer SealMiner A2 Pro Hyd 175% more home mining score (16.0 vs 44.0)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Bitmain Antminer S21 (200Th) | Metric | Bitdeer SealMiner A2 Pro Hyd |
|---|---|---|
| $1,076 | Upfront cost (MSRP) | $4,600 |
| -$1.35 | Daily net profit | $0.04 |
| -$1,570 | Net after 1 year | -$4,587 |
| -$2,064 | Net after 2 years | -$4,574 |
| -$2,558 | Net after 3 years | -$4,561 |
| Does not pay back at current rates (negative daily profit) | Payback period | Takes ~356.1 years to pay back at current rates |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
Best For...
Best for Profitability
Bitdeer SealMiner A2 Pro Hyd$1.39/day higher profit at current rates.
Best for Home Mining
Bitdeer SealMiner A2 Pro HydScore: 44/100. 50 dB noise level.
Best for Efficiency
Bitdeer SealMiner A2 Pro Hyd14.9 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21 (200Th) or Bitdeer SealMiner A2 Pro Hyd more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A2 Pro Hyd is more profitable at $0.04/day compared to $-1.35/day for the Bitmain Antminer S21 (200Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21 (200Th) or Bitdeer SealMiner A2 Pro Hyd?
The Bitdeer SealMiner A2 Pro Hyd is quieter at 50 dB compared to the Bitmain Antminer S21 (200Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer S21 (200Th) vs Bitdeer SealMiner A2 Pro Hyd: which fits a residential setup better?
The Bitdeer SealMiner A2 Pro Hyd scores 44/100 on our Home Mining Score (vs 16/100 for the Bitmain Antminer S21 (200Th)). 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 (200Th) and Bitdeer SealMiner A2 Pro Hyd?
The Bitmain Antminer S21 (200Th) runs at 17.8 J/TH while the Bitdeer SealMiner A2 Pro Hyd runs at 14.9 J/TH — a difference of 2.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 16% better efficiency (17.8 vs 14.9 J/TH).
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