The Bitmain Antminer S21 XP+ Hyd is one of the most powerful ASIC miners on the market, delivering an impressive hashrate of 500 Th/s with optimized energy efficiency. Designed for serious mining operations, this hydro-cooled model maximizes performance while minimizing noise and thermal output—making it ideal for large-scale data centers and industrial mining farms.
In this comprehensive guide, we break down the profitability, specifications, supported algorithms, mineable coins, and repair services available for the Antminer S21 XP+ Hyd. Whether you're evaluating your next hardware investment or scaling an existing mining operation, this analysis delivers actionable insights based on current market conditions as of 2025.
Profitability Overview
Mining profitability depends on multiple factors: electricity cost, network difficulty, cryptocurrency prices, and hardware efficiency. The Antminer S21 XP+ Hyd stands out due to its high hashrate and relatively efficient power consumption.
Daily, Monthly, and Annual Profit Estimates
| Period | Income | Electricity Cost | Profit |
|---|---|---|---|
| Per Day | $29.56 | -$13.20 | $16.36 |
| Per Month | $886.93 | -$396.00 | $490.93 |
| Per Year | $10,790.93 | -$4,818.00 | $5,972.93 |
At a power draw of 5,500 watts and average U.S. electricity rates (~$0.05/kWh), the miner generates approximately **$16.36 in daily profit, translating to nearly $6,000 annually** after energy costs.
👉 Discover how to maximize your mining returns with real-time tracking tools
Supported Algorithm: SHA-256
The Antminer S21 XP+ Hyd is built exclusively for the SHA-256 algorithm, which powers Bitcoin (BTC) and several other cryptocurrencies like Bitcoin Cash (BCH). Its performance metrics are among the best in class:
- Hashrate: 500 Th/s
- Power Consumption: 5,500W
- Efficiency: 11.00 J/Th
- Income per kWh: $0.2240
This level of efficiency ensures long-term competitiveness even as network difficulty increases.
Most Profitable Coin to Mine
While multiple SHA-256 coins can be mined, Bitcoin (BTC) remains the most profitable option due to its high market value and dominant network hash rate.
| Coin | Net Hashrate | Price (USD) | 24h Output | Revenue (USD) |
|---|---|---|---|---|
| BTC | 845.8 Eh/s | $109,068 | 0.000271 BTC | $29.56 |
| BCH | 3.627 Eh/s | $482.40 | 0.0598 BCH | $28.85 |
Despite similar mining dynamics, Bitcoin’s superior price makes it the optimal choice for miners using this hardware.
Technical Specifications
Understanding the physical and technical attributes of the Antminer S21 XP+ Hyd helps assess its suitability for different environments.
- Release Date: July 2025
- Dimensions: 339 x 173 x 207 mm
- Weight: 13.8 kg
- Hashrate: 500 Th/s
- Power Draw: 5,500 watts
- Noise Level: 50 dB (ultra-quiet thanks to hydro-cooling)
- Operating Temperature: 20–50°C
Its compact size and low noise profile make it suitable for indoor installations where airflow and acoustics matter. The hydro-cooling system significantly reduces thermal stress on components, potentially extending the device’s operational lifespan.
Payback Time and Return on Investment
With a current estimated daily profit of $16.36, the payback period for the Antminer S21 XP+ Hyd is approximately:
21.29 months (639 days)
This assumes stable electricity costs and no major shifts in Bitcoin’s price or network difficulty. In bull markets, where BTC prices rise and mining rewards increase in USD value, payback time could shrink dramatically.
👉 Learn how institutional-grade platforms help optimize mining ROI
Mining Pool Compatibility
To maintain consistent earnings, miners should connect to reliable SHA-256 mining pools. Popular options include:
- F2Pool
- Antpool (by Bitmain)
- Slush Pool
- ViaBTC
- Poolin
These pools distribute rewards based on contributed hashrate and offer transparent fee structures and real-time monitoring dashboards.
Choosing a geographically close pool minimizes latency and improves connection stability—critical for maintaining full uptime on high-performance rigs like the S21 XP+ Hyd.
Repair and Maintenance Services
Even the most robust ASIC miners require occasional servicing. Fortunately, numerous global providers support the Bitmain Antminer series.
Here are some trusted repair service providers:
- D-Central Technologies – Offers repairs for Bitmain, MicroBT, Canaan, and more. Based in North America (UTC -5), open Monday–Friday.
- ARCT Electronique – Full-model support with weekday availability (UTC +1).
- Dynamics Circuit (S) Pte. Ltd – Pan-Asian service provider covering all models (UTC +8).
- SustainHash Repair & Service Ltd. – Specializes in Bitmain and MicroBT units (UTC -7).
- Blocklabsfractal SL – Provides round-the-clock support seven days a week (UTC +1).
Regular maintenance can prevent dust buildup, cooling inefficiencies, and board failures—common causes of downtime in continuous-use environments.
Frequently Asked Questions (FAQ)
Q: Is the Antminer S21 XP+ Hyd worth buying in 2025?
Yes, especially if you have access to low-cost electricity (< $0.07/kWh). With a profit margin of over $16/day and strong energy efficiency, it remains competitive despite newer entrants in the market.
Q: Can I use the S21 XP+ Hyd for mining Bitcoin Cash?
Technically yes, since BCH uses SHA-256. However, mining Bitcoin is more profitable due to its higher market value and network stability.
Q: How loud is the Antminer S21 XP+ Hyd?
It operates at just 50 dB, comparable to normal conversation levels—remarkably quiet for a 500 Th/s machine—thanks to its integrated hydro-cooling system.
Q: What is the expected lifespan of this miner?
With proper maintenance and optimal operating conditions, ASIC miners like the S21 XP+ Hyd typically last 3 to 5 years before efficiency declines significantly.
Q: Does hydro-cooling require special setup?
Yes. Hydro-cooled models need a closed-loop cooling system with pumps and radiators. They’re best suited for data centers with dedicated infrastructure rather than home setups.
Q: Where can I monitor my mining performance?
Use platform-agnostic tools like Hive OS or Awesome Miner to track hashrate, temperature, power draw, and earnings across multiple devices—including the S21 XP+ Hyd.
Final Thoughts
The Bitmain Antminer S21 XP+ Hyd (500Th/s) represents the cutting edge of Bitcoin mining technology in 2025. Combining exceptional hashrate, industry-leading efficiency, and quiet operation through hydro-cooling, it's engineered for maximum uptime and profitability.
For miners focused on long-term gains and scalable operations, this unit offers one of the best risk-adjusted returns in the current landscape—especially when paired with smart energy sourcing and proactive maintenance.
👉 Explore advanced trading and staking strategies to boost your crypto income beyond mining