Bitmain Antminer S21e XP Hyd 3U vs Bitdeer SealMiner A2 Pro Air
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21e XP Hyd 3U | Specification | Bitdeer SealMiner A2 Pro Air |
|---|---|---|
| 860.0 TH/s | Hashrate | 255.0 TH/s |
| 11,180 W | Power Consumption | 3,790 W |
| 13.0 J/TH | Efficiency | 14.9 J/TH |
| 50 dB | Noise Level | 75 dB |
| — | Weight | 15.5 kg |
| 38,146 BTU/hr | BTU Output | 12,932 BTU/hr |
| 44/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Bitmain Antminer S21e XP Hyd 3U
Bitdeer SealMiner A2 Pro Air
Based on BTC price of $79,086 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer S21e XP Hyd 3U, which leads on 5 of 6 weighted factors (efficiency, hashrate, home mining score, noise level, price-performance). Where it pulls away hardest is 237% more hashrate (860 vs 255 TH/s). That said, the Bitdeer SealMiner A2 Pro Air isn't beaten everywhere — it still wins power consumption. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S21e XP Hyd 3U and Bitdeer SealMiner A2 Pro Air sit on each measurable spec:
- Bitmain Antminer S21e XP Hyd 3U 237% more hashrate (860 vs 255 TH/s)
- Bitdeer SealMiner A2 Pro Air 66% better power draw (11,180 vs 3,790 W)
- Bitmain Antminer S21e XP Hyd 3U 13% better efficiency (13.0 vs 14.9 J/TH)
- Bitmain Antminer S21e XP Hyd 3U 33% better noise (50.0 vs 75.0 dB)
- Bitmain Antminer S21e XP Hyd 3U 195% more heat output (38,146 vs 12,932 BTU/hr)
- Bitmain Antminer S21e XP Hyd 3U 47% more home mining score (44.0 vs 30.0)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Bitmain Antminer S21e XP Hyd 3U | Metric | Bitdeer SealMiner A2 Pro Air |
|---|---|---|
| $10,899 | Upfront cost (MSRP) | $4,000 |
| $4.47 | Daily net profit | $0.18 |
| -$9,269 | Net after 1 year | -$3,933 |
| -$7,638 | Net after 2 years | -$3,865 |
| -$6,008 | Net after 3 years | -$3,798 |
| Takes ~6.7 years to pay back at current rates | Payback period | Takes ~59.4 years to pay back at current rates |
At the default rate, the Bitmain Antminer S21e XP Hyd 3U reaches break-even first — but plug in your own electricity cost above, since payback shifts sharply with it.
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
Bitmain Antminer S21e XP Hyd 3U$4.28/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21e XP Hyd 3UScore: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S21e XP Hyd 3U13.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S21e XP Hyd 3U or the Bitdeer SealMiner A2 Pro Air?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21e XP Hyd 3U is more profitable at $4.47/day compared to $0.18/day for the Bitdeer SealMiner A2 Pro Air. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21e XP Hyd 3U or Bitdeer SealMiner A2 Pro Air?
The Bitmain Antminer S21e XP Hyd 3U is quieter at 50 dB compared to the Bitdeer SealMiner A2 Pro Air at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S21e XP Hyd 3U or Bitdeer SealMiner A2 Pro Air?
The Bitmain Antminer S21e XP Hyd 3U scores 44/100 on our Home Mining Score (vs 30/100 for the Bitdeer SealMiner A2 Pro Air). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Bitmain Antminer S21e XP Hyd 3U and Bitdeer SealMiner A2 Pro Air on J/TH?
The Bitmain Antminer S21e XP Hyd 3U runs at 13.0 J/TH while the Bitdeer SealMiner A2 Pro Air runs at 14.9 J/TH — a difference of 1.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 13% better efficiency (13.0 vs 14.9 J/TH).
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