The Bitmain Antminer S21+ Hyd (358Th/s) is a powerful hydro-cooled Bitcoin ASIC miner built for the SHA-256 algorithm, specifically optimized for Bitcoin (BTC) mining in professional and industrial-scale environments.
Delivering a strong 358 TH/s hashrate with a power draw of 5370W, the S21+ Hyd maintains an efficiency rating of 15 J/TH, making it an excellent choice for miners seeking higher hashrate density while keeping operational costs under control.
Released in August 2025, this model features Bitmain’s factory-engineered hydro-cooling system, enabling stable 24/7 operation with significantly reduced noise and superior thermal performance compared to traditional air-cooled miners. Hydro cooling allows for higher rack density, improved hardware longevity, and cleaner deployment in modern mining data centers.
As part of the Antminer S21+ Hydro series, the 358Th variant is ideal for large-scale mining farms, hosting providers, and institutional operators with liquid-cooling infrastructure looking to scale efficiently while maintaining reliability.
358 TH/s Bitcoin hashrate
Efficient 15 J/TH power performance
Factory-integrated hydro-cooling
Low noise output (50 dB)
Optimized for SHA-256 / BTC mining
Designed for enterprise & hosted mining facilities
Member of Bitmain’s Antminer S21+ Hydro lineup
| Specifications | |
| Algorithm | SHA-256 |
| Hashrate | 358 TH/s ±5% |
| Power Consumption | 5370 W ±5% |
| Efficiency | 15 J/TH |
| Noise Level | 50 dB |
| Dimensions | 410 × 170 × 209 mm |
| Weight | 14.5kg |
| Interface | Ethernet |
| Temprature | 5 – 45 °C |
| Humidity | 5 – 95% (non-condensing) |
