The Bitmain Antminer S21+ (216Th/s) is an upgraded, high-efficiency Bitcoin ASIC miner built for SHA-256 algorithm mining, exclusively targeting Bitcoin (BTC). Positioned between the standard S21 and higher-end enterprise models, the S21+ delivers improved efficiency and performance while maintaining a familiar air-cooled design.
With a hashrate of 216 TH/s and a power draw of 3564W, the Antminer S21+ achieves an efficiency of 16.5 J/TH, making it a strong choice for miners seeking better performance per watt without the complexity of hydro or immersion cooling systems.
Released in February 2025, the S21+ features Bitmain’s proven dual-fan air-cooling architecture, ensuring consistent thermal management and long-term operational stability. Its compact industrial chassis allows for seamless deployment in standard mining racks, containers, or hosting facilities.
Powered by Bitmain’s latest Antminer control platform, the S21+ is ideal for mid-scale mining farms, hosting providers, and independent BTC miners looking for reliable, next-gen hardware with optimized energy efficiency.
216 TH/s Bitcoin hashrate
Improved 16.5 J/TH energy efficiency
Reliable air-cooled design
Dual high-performance cooling fans
Optimized for SHA-256 / BTC mining
Compact form factor for easy deployment
Proven Bitmain Antminer S21+ platform
| Specifications | |
| Algorithm | SHA-256 |
| Hashrate | 216 TH/s ±5% |
| Power Consumption | 3564 W ±10% |
| Efficiency | 16.5 J/TH |
| Noise Level | 75 dB |
| Dimensions | 400 × 195 × 290 mm |
| Weight | 22.9 kg |
| Interface | Ethernet |
| Temprature | 10 – 40 °C |
| Humidity | 10 – 90% (non-condensing) |
