ASICs
Antminer S21 Pro
Higher air-cooled efficiency, improved chip design, and optimized power management, delivering higher hashrate at lower energy cost, without the complexity of liquid cooling.
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About Bitmain Antminer S21 Pro
The Bitmain Antminer S21 Pro is the advanced evolution of the acclaimed S21 series, setting a new benchmark for air-cooled mining efficiency. By refining chip architecture and power management, Bitmain has created a machine that pushes hashrate limits while lowering energy costs. The S21 Pro is designed for miners who demand maximum operational uptime and industry-leading efficiency without transitioning to complex liquid cooling infrastructures.
Available in: 234 TH/s, 245 TH/s
Key Specifications
Feature | Specification |
Model | Antminer S21 Pro |
Hashrate | 234 TH/s ± 3% (Typical) |
Power Consumption | 3,510 W ± 5% |
Power Efficiency | ~15.0 J/TH |
Algorithm | SHA-256 (Bitcoin) |
Cooling System | Air Cooled (4 x High-Speed Fans) |
Voltage | 220V ~ 277V AC |
Dimensions | 450mm x 219mm x 293mm |
Net Weight | 20.0 kg |
Unmatched Performance
The Antminer S21 Pro is a powerhouse built for the SHA-256 algorithm, delivering a massive hashrate of 234 TH/s (with higher bin options up to 245 TH/s). This significant increase in throughput allows mining operations to densify their processing power per rack, maximizing revenue potential in a competitive network environment. The S21 Pro is engineered to maintain high performance even as mining difficulty increases.
Robust Air Cooling System
Unlike hydro models, the S21 Pro relies on a proven, high-performance air-cooling architecture. It features a dual-fan intake and dual-fan exhaust system designed to force maximum airflow across the hash boards.
High-Flow Dissipation: The four powerful fans ensure rapid heat removal, keeping the machine stable even under heavy workloads.
Higher Temperature Tolerance: Designed to operate effectively in ambient temperatures up to 45°C, the S21 Pro offers greater flexibility for deployment in warmer climates compared to previous generations.
Simplified Infrastructure: As an air-cooled unit, it requires no water pumps, cooling towers, or complex plumbing, making it easy to deploy in standard shelving environments.
Efficiency & Industrial Design
Achieving an exceptional power efficiency of 15.0 J/TH, the S21 Pro is one of the most efficient air-cooled miners in existence. It consumes approximately 3,510W, ensuring that a higher percentage of your electricity bill is converted directly into hashing power. The unit is housed in a durable aluminum casing with an integrated power supply (APW17 series) that supports a wide voltage range (220-277V), compatible with most industrial PDU setups.
Conclusion
The Bitmain Antminer S21 Pro is the definitive choice for miners seeking the highest possible efficiency in an air-cooled form factor. With its 15.0 J/TH rating and robust 234 TH/s output, it offers the perfect balance of performance and ease of use, ensuring a faster ROI and prolonged relevance in the global mining market.