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.

Key Features

• 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