The Bitmain Antminer S21+ Hyd is a high-performance ASIC miner engineered for maximum efficiency and reliability in modern cryptocurrency mining operations. With a robust hashrate of 319 TH/s and ultra-efficient power consumption of just 4785W, this liquid-cooled mining rig sets a new benchmark for SHA-256 algorithm mining. Designed for professional miners and large-scale mining farms, the S21+ Hyd combines cutting-edge hydro-cooling technology with industrial-grade hardware to deliver sustained performance under demanding conditions.
Key Performance Metrics
- Daily Profitability: ~$7.46
- Return on Investment (ROI): ~24.6 months
- Hashrate: 319.00 TH/s
- Power Consumption: 4785W
- Energy Efficiency: 15 J/TH
These metrics position the Antminer S21+ Hyd as one of the most energy-efficient high-hashrate miners available in 2025, especially when operating in environments optimized for liquid cooling infrastructure.
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Technical Specifications
Product Overview
| Feature | Specification |
|--------|---------------|
| Model | Antminer S21+ Hyd |
| Algorithm | SHA-256 |
| Compatible Coins | Bitcoin (BTC), Bitcoin Cash (BCH), Bitcoin SV (BSV) |
| Typical Hashrate | 319 TH/s (±3%) |
| Power Consumption (at wall) | 4785W (±5%) |
| Energy Efficiency | 15 J/TH |
Power Requirements
This miner requires a specialized three-phase power supply setup:
- Input Voltage: 380–415V
- Frequency Range: 50–60 Hz
- Max Input Current: 12A
⚠️ Note: Due to its high-voltage requirements, the S21+ Hyd is not suitable for standard residential power systems. Consult with technical experts before deployment to ensure compatibility with your facility’s electrical infrastructure.
Cooling System & Environmental Tolerance
The S21+ Hyd utilizes advanced liquid cooling technology, making it ideal for data centers and industrial mining farms where heat dissipation is critical.
- Coolant Type: Antifreeze, pure water, or deionized water
- Inlet Coolant Temperature: 20–50°C
- Flow Rate: 8.0–10.0 L/min
- Maximum Pressure: ≤3.5 bar
- Pipe Connector Diameter: OD10 mm
- pH Range: Varies by coolant type (7.0–9.5)
Operating within these parameters ensures optimal thermal management and long-term hardware durability.
Why Choose the Antminer S21+ Hyd?
Superior Energy Efficiency
With an efficiency rating of 15 J/TH, the S21+ Hyd outperforms many competing models in its class. Lower energy consumption directly translates to higher net profits—especially crucial in regions with elevated electricity costs.
Industrial-Grade Build & Reliability
Weighing 14.5 kg (net), the unit features a compact design (339×173×207 mm) that maximizes space utilization in dense mining racks. Its rugged construction supports continuous operation in harsh environments, with a storage temperature range of -20°C to 70°C and humidity tolerance from 10% to 90% RH (non-condensing).
Factory Warranty & Support
All brand-new units come with a 365-day factory warranty from Bitmain, covering defects in materials and workmanship. Technical support is available within 24 hours via email or instant messaging, ensuring minimal downtime.
👉 Learn how to optimize your mining setup for maximum uptime
Shipping & Handling
New units are shipped from Bitmain-certified warehouses in Shenzhen or Hong Kong. Orders are typically dispatched within 3–7 business days after payment verification. International deliveries via DHL or UPS take approximately 5–10 business days, depending on destination.
You’ll receive a tracking number and shipping confirmation email once your order leaves the warehouse.
All sales are final after shipment. However, repair and replacement services are available for units experiencing technical faults.
Comparison with Competing Models
While the MicroBT WhatsMiner M63S offers competitive hashrate, the Antminer S21+ Hyd excels in energy efficiency and environmental adaptability:
- Operates effectively within a broader temperature range (20–50°C inlet coolant)
- Tolerates higher humidity levels (up to 90% non-condensing)
- Consumes significantly less power per terahash than comparable air-cooled units
For operators focused on reducing operational overhead and maximizing ROI, the S21+ Hyd presents a compelling upgrade path.
Mining Profitability Insights
Cryptocurrency mining profitability depends on several dynamic factors:
- Electricity Cost: High power rates can erode margins quickly. Efficient miners like the S21+ Hyd help mitigate this risk.
- Coin Volatility: Bitcoin’s price stability compared to altcoins reduces financial risk.
- Hashrate Growth: As network difficulty increases, higher hashrate machines maintain profitability longer.
- Cooling Efficiency: Liquid-cooled systems reduce ambient heat output, lowering data center cooling costs.
Operators using the S21+ Hyd report improved profitability margins—especially when integrated into large-scale, temperature-controlled mining farms.
👉 Explore tools to calculate your real-time mining profits
Frequently Asked Questions (FAQs)
What is the expected lifespan of the Antminer S21+ Hyd?
With proper maintenance and operation within recommended environmental conditions, the Antminer S21+ Hyd can last 3 to 5 years. Regular cleaning of coolant lines, stable voltage input, and consistent firmware updates contribute to extended longevity.
How does electricity cost affect mining profitability?
Electricity is the largest ongoing expense in mining. At $0.06/kWh, the S21+ Hyd remains profitable even during market downturns. However, at rates above $0.10/kWh, profit margins shrink significantly—making energy-efficient hardware essential for sustainability.
Can I use this miner at home?
Due to its high-voltage three-phase power requirement (380–415V) and liquid cooling system, the S21+ Hyd is not suitable for residential use. It is designed for industrial facilities equipped with appropriate power infrastructure and cooling setups.
Does the miner come with a power supply unit (PSU)?
No—the Antminer S21+ Hyd does not include a PSU. You must purchase a compatible industrial-grade power supply that meets the three-phase voltage and current specifications.
What coins can I mine with the S21+ Hyd?
The miner supports all cryptocurrencies using the SHA-256 algorithm, including:
- Bitcoin (BTC)
- Bitcoin Cash (BCH)
- Bitcoin SV (BSV)
Most miners prioritize BTC due to its liquidity and market dominance.
How is ROI calculated for this miner?
ROI is based on current network difficulty, electricity cost, and BTC price. At today’s average conditions (~$60,000 BTC price, $0.06/kWh electricity), the estimated payback period is around 24.6 months.
Core Keywords
Bitcoin miner, ASIC miner, Bitmain Antminer S21+ Hyd, SHA-256 mining, liquid-cooled miner, cryptocurrency mining hardware, energy-efficient miner, high-hashrate miner
By integrating advanced hydro-cooling, industrial durability, and elite energy efficiency, the Bitmain Antminer S21+ Hyd stands as a top-tier solution for serious miners aiming to future-proof their operations in an increasingly competitive landscape.