Introduction
The Bitmain Antminer S21 stands as a powerhouse in Bitcoin mining, delivering an impressive 200TH/s hash rate with optimized energy efficiency. This review covers its specifications, profitability, and comparisons to previous models, providing essential insights for both novice and experienced miners.
Key Specifications
- Hashrate: 200TH/s (±3% fluctuation)
- Power Consumption: 3500W (±5% fluctuation)
- Energy Efficiency: 17.5 J/TH
- Noise Level: 76 dBA @30°C
- Dimensions: 400mm × 195mm × 290mm (without packaging)
- Weight: 15.4 kg (net)
👉 Explore the Antminer S21’s full specifications
Profitability Analysis
| Metric | Value |
|---|---|
| Daily Profit | $3.21 |
| ROI Period | 27.9 months |
| Power Cost | 3500W |
Note: Profitability varies based on electricity costs ($0.05–$0.12/kWh) and Bitcoin’s market price.
Comparison with Previous Models
| Model | Hashrate | Power | Efficiency |
|---|---|---|---|
| Antminer S21 | 200TH/s | 3500W | 17.5 J/TH |
| Antminer S19 Pro | 110TH/s | 3250W | 29.5 J/TH |
| Antminer S9 | 14TH/s | 1323W | 98 J/TH |
The S21 outperforms predecessors with 42% better efficiency and 81% higher hashrate.
FAQs
1. What’s the lifespan of the Antminer S21?
With proper cooling and maintenance, ASIC miners typically last 3–5 years. Dust filters and stable temperatures below 35°C are recommended.
2. How do electricity costs impact ROI?
At $0.10/kWh**, the S21 yields $3.21/day profit. If rates exceed $0.15/kWh, profitability drops by 30%**.
3. Does Bitmain offer a warranty?
Yes, 365-day factory warranty for brand-new units.
Shipping & Policies
- Delivery Time: 5–10 business days (DHL).
- Returns: Non-refundable but includes repair services for defects.
- Taxes: Buyers bear customs duties (varies by country).
👉 Learn about energy-efficient mining setups
Conclusion
The Antminer S21 is a top-tier choice for serious miners, balancing high performance with energy efficiency. Its 200TH/s capability and 17.5 J/TH efficiency set a new benchmark in SHA-256 mining.
Keywords: Bitcoin miner, Antminer S21, 200TH/s, mining profitability, Bitmain, SHA-256, ASIC miner, ROI.
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