The Bitmain Antminer S21 XP+ Hyd (500Th) is a next-generation ASIC miner engineered for high-efficiency Bitcoin mining. As one of the most anticipated SHA-256 mining rigs set for release in mid-2025, it combines cutting-edge hydro cooling technology with industry-leading hashrate performance. Whether you're scaling an existing mining operation or entering the space with enterprise-grade hardware, this model promises to deliver strong returns—provided you understand its capabilities, power requirements, and market positioning.
Technical Specifications and Design
The Antminer S21 XP+ Hyd is built for durability and thermal efficiency. Unlike traditional air-cooled models, this unit features hydro cooling (OD10), which significantly reduces operating temperatures and noise levels—critical factors in large-scale mining farms.
Key specs include:
- Hashrate: 500Th/s ±5%
- Power consumption: 5,500W ±5%
- Energy efficiency: 11 joules per terahash (J/TH)
- Dimensions: 339 x 173 x 207 mm
- Weight: 13.8 kg
- Noise level: Just 50dB—comparable to a quiet office environment
- Operating temperature: 20°C to 50°C
- Voltage requirement: 380–415V (industrial-grade power supply)
This miner uses an Ethernet interface for connectivity and supports standard mining protocols compatible with major Bitcoin mining pools.
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Mining Algorithm and Compatibility
The S21 XP+ Hyd is optimized exclusively for the SHA-256 hashing algorithm, making it ideal for mining Bitcoin (BTC) and other SHA-256-based cryptocurrencies such as Bitcoin Cash (BCH). While BTC dominates this ecosystem, miners may choose to switch between coins based on profitability, though most will remain focused on Bitcoin due to its market dominance and network security.
Due to its specialized design, this ASIC cannot mine proof-of-stake or memory-hard algorithms like Ethash, RandomX, or KawPow. Its value lies in raw BTC mining power and energy efficiency at scale.
Energy Efficiency: Why 11J/TH Matters
In Bitcoin mining, energy efficiency directly impacts profitability. The 11J/TH rating of the S21 XP+ Hyd places it among the most efficient miners available in 2025. To put this into perspective:
- Older models like the Antminer S19 Pro operate at ~29.5J/TH.
- The S21 series improves efficiency by over 60% compared to early S19 units.
- Lower joules per terahash mean less electricity used per BTC mined—translating to higher net profits, especially in regions with moderate electricity costs.
For example, at $0.06/kWh:
- Daily power cost ≈ $7.92
- Estimated daily revenue ≈ $28–$32 (depending on BTC price and network difficulty)
- Net profit margin could exceed 70%, assuming stable conditions
However, profitability fluctuates with Bitcoin’s price, network difficulty adjustments, and electricity rates.
Profitability Outlook in 2025
While exact earnings depend on dynamic variables, early estimates suggest the Antminer S21 XP+ Hyd can generate approximately $18–$24 per day in net profit under optimal conditions (electricity at $0.05–$0.07/kWh).
Factors influencing profitability:
- Bitcoin market price
- Network hashrate growth
- Mining pool fees
- Cooling and infrastructure overhead
With a projected payback period of 8–12 months for units priced around $10,000, this miner offers compelling economics for well-positioned operations.
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Where to Buy the Bitmain Antminer S21 XP+ Hyd
As of mid-2025, several trusted vendors offer the Antminer S21 XP+ Hyd globally. Pricing varies slightly by region and stock availability:
| Vendor | Region | Stock Status | Price (USD) |
|---|---|---|---|
| UMiners | Asia (Hong Kong) | In stock | $9,696 |
| BT-Miners | Americas (USA) | In stock | $9,600 |
| YesMining | Asia (Hong Kong) | In stock | $10,240 |
| Miner Bros | Asia (Hong Kong) | In stock | $10,249 |
| Coin Mining Central | Europe (UK) | Pre-order (Aug 2025) | £8,500 (~$10,750) |
European buyers may face higher prices due to import duties and logistics. Buyers in North America should consider BT-Miners for competitive pricing and faster delivery.
⚠️ Always verify vendor reputation before purchase. Look for warranties, after-sales support, and shipping insurance.
Cooling Innovation: Hydro vs Air
One of the standout features of the S21 XP+ Hyd is its hydro-cooling system. Traditional air-cooled miners require extensive ventilation, industrial fans, and climate-controlled environments—adding operational complexity and cost.
Hydro cooling offers:
- Lower ambient heat output
- Quieter operation
- Higher density deployment potential
- Reduced HVAC requirements
This makes the S21 XP+ Hyd particularly suitable for data centers and indoor mining farms where noise and heat dissipation are critical concerns.
Frequently Asked Questions (FAQ)
Q: What is the expected lifespan of the Bitmain Antminer S21 XP+ Hyd?
A: With proper maintenance and stable power conditions, ASIC miners typically last 3–5 years. The hydro-cooled design may extend longevity by reducing thermal stress on components.
Q: Does the Antminer S21 XP+ Hyd come with a power supply unit (PSU)?
A: Some vendors sell it with a compatible PSU; others offer it separately. Confirm bundle details before purchasing.
Q: Can I use this miner for home-based Bitcoin mining?
A: Technically yes, but not practically. The 380–415V voltage requirement means it needs industrial power infrastructure—unsuitable for standard residential outlets.
Q: Is the hydro-cooling system difficult to maintain?
A: It requires periodic checks for fluid levels and pump functionality but generally demands less maintenance than large fan arrays in air-cooled systems.
Q: How does network difficulty affect profitability?
A: As more miners join the network, difficulty increases, reducing individual rewards. Long-term profitability depends on balancing hashrate growth with BTC price appreciation.
Q: What mining pools work best with this device?
A: Top pools include F2Pool, Slush Pool, and Antpool—all compatible via Ethernet connection and standard Stratum protocols.
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Final Thoughts
The Bitmain Antminer S21 XP+ Hyd (500Th) represents a significant leap forward in Bitcoin mining technology. With industry-leading efficiency, quiet hydro cooling, and robust build quality, it's poised to become a staple in professional mining operations throughout 2025 and beyond.
Core keywords naturally integrated: Bitmain Antminer S21 XP+ Hyd, Bitcoin mining, SHA-256, ASIC miner, hydro cooling, 500Th/s, energy efficiency, mining profitability
For investors and operators focused on maximizing BTC yield while minimizing operational friction, this miner delivers a powerful combination of performance and sustainability.