The Antminer S21 Hyd is Bitmain’s solution for miners who demand the highest possible density and efficiency. By utilizing hydro-cooling technology, this miner pushes the boundaries of the SHA-256 algorithm, providing a stable and massive output for Bitcoin (BTC) and Bitcoin Cash (BCH) mining. Antminer S21 Imm 300 TH/s
Unrivaled Efficiency (15.0 J/T)
In the post-halving landscape, efficiency determines survival. The Antminer S21 Hyd 358 TH/s operates at a power consumption of 5370W, achieving an industry-leading efficiency of 15.0 J/T.1 This ensures that your operational expenses (OPEX) are kept to a minimum while your revenue is maximized.
The Advantages of Hydro-Cooling
Hydro-cooled miners like the S21 Hyd are designed for professional data centers and offer significant benefits over traditional air-cooled units:2
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Silent Operation: Without the need for high-RPM fans, the S21 Hyd is nearly silent, making it suitable for a wider range of environments.
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Superior Thermal Stability: Water cooling provides more consistent temperature control for the internal chips, reducing hardware stress and extending the miner’s lifespan.
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Space Efficiency: The compact design allows for higher density within mining racks, maximizing your hashrate per square meter.
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Heat Recovery: The hot water generated by the cooling loop can be repurposed for industrial or domestic heating, further increasing the overall ROI.
Technical Specifications Overview
| Feature | Specification |
| Manufacturer | Bitmain |
| Model | Antminer S21 Hyd (358 TH/s) |
| Algorithm | SHA-256 (BTC, BCH, BSV) |
| Hashrate | 358 TH/s ±3% |
| Power Consumption | 5370W ±5% |
| Power Efficiency | 15.0 J/T |
| Cooling System | Hydro-Cooling (Water-cooled) |
| Operating Humidity | 10% ~ 90% |
| Network Connection | RJ45 Ethernet 10/100M |
Why Purchase from CryptoMiners24?
Buying professional hydro-cooled mining hardware requires a supplier with technical expertise and a proven track record.
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Authentic Hardware: We guarantee 100% genuine, factory-new Antminer S21 Hyd units with valid manufacturer warranties.
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Secure Payment Options: Pay with ease using Bitcoin (BTC), USDT, or traditional bank transfers.
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Global Shipping Expertise: We ship to over 100 countries, ensuring your hardware is fully insured and delivered quickly via premium couriers.
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Hydro Setup Support: Our team can provide guidance on the necessary cooling loops and infrastructure required for hydro-cooled deployments.





