The Bitmain Antminer S21+ is a state-of-the-art Bitcoin mining rig engineered for professional miners seeking optimal performance and energy efficiency. Designed to mine SHA256 cryptocurrencies like BTC, BCH, and BSV, this machine combines raw hashing power with advanced thermal management. Below, we explore its technical specifications, design advantages, and operational best practices.
Technical Specifications
- Model: Antminer S21+
- Algorithm: SHA256
- Supported Coins: Bitcoin (BTC), Bitcoin Cash (BCH), Bitcoin SV (BSV)
- Hashrate: 216 TH/s (base), 225 TH/s (optimized), or 235 TH/s (peak)
- Power Consumption: 3,564W @ 25°C
- Power Efficiency: 16.5 J/TH (industry-leading)
- Power Supply: Single-phase AC (220–277V input)
- Connectivity: RJ45 Ethernet (10/100M)
Hardware Design and Durability
Compact and Industrial-Grade Build
Dimensions:
- Unit: 450mm × 219mm × 293mm
- Packaged: 630mm × 350mm × 430mm
Weight:
- Net: 21.5kg
- Gross: 24.5kg
- Noise Level: 76 dBA @ 30°C (suited for data centers)
Environmental Adaptability
- Operating Range: -20°C to 45°C
- Storage Tolerance: -20°C to 70°C
- Humidity: 10%–90% RH (non-condensing)
- Max Altitude: 2,000m
Key Advantages
- Unmatched Efficiency
With a power efficiency of 16.5 J/TH, the S21+ reduces operational costs while maximizing output. - Scalable Performance
Adjustable hashrates (up to 235 TH/s) allow miners to optimize for power constraints or profit targets. - Reliable Connectivity
The built-in RJ45 port ensures stable mining pool integration. - Thermal Resilience
Operates flawlessly in extreme temperatures (-20°C to 45°C), ideal for global deployments.
Optimizing Your S21+ Mining Setup
Recommended Practices
- Power Supply: Use a 220–277V single-phase PSU with surge protection.
- Cooling: Deploy in well-ventilated spaces or with auxiliary cooling at >30°C.
- Maintenance: Regularly clean dust filters to prevent overheating.
👉 Explore industrial mining PSUs for compatible high-wattage options.
Profitability Analysis
| Factor | Value | Impact on ROI |
|----------------------|----------------------|-----------------------|
| Hashrate | 235 TH/s | +15% vs. 216 TH/s |
| Power Cost | $0.07/kWh | 30% lower OpEx |
| Pool Fees | 1–2% | Negotiate discounts |
Example: At 235 TH/s and $0.07/kWh, the S21+ yields ~$12/day profit post-electricity (BTC @ $65,000).
FAQs
Q: Can the S21+ mine other coins besides BTC?
A: Yes! It supports all SHA256-based coins like Bitcoin Cash (BCH) and Bitcoin SV (BSV).
Q: What’s the lifespan of this miner?
A: With proper cooling and maintenance, expect 3–5 years of optimal performance.
Q: Is it noisy for home use?
A: At 76 dBA, it’s designed for data centers—not residential spaces.
Q: How does it compare to the S19 Pro?
A: The S21+ offers 20% better efficiency and higher peak hashrates.
👉 Compare Antminer models side-by-side for detailed benchmarks.
Final Thoughts
The Antminer S21+ sets a new standard for energy-efficient Bitcoin mining, balancing raw power with sustainability. Whether upgrading a farm or launching a new operation, its 235 TH/s capacity and rugged design make it a future-proof investment.
Pro Tip: Pair with renewable energy sources to further slash operational costs and carbon footprint.