Antminer S21+ Hydro – 319 to 395 TH/s Bitcoin ASIC Miner

Antminer S21+ Hydro: select your hashrate and hosting setup

The Bitmain Antminer S21+ Hydro is a water-cooled SHA-256 ASIC for Bitcoin mining. This listing offers four configurations, including the 395 TH/s model. Select the required variant to see its price and ordering options.

Get my S21+ Hydro equipment and hosting quote

Model-specific specifications

BITMAIN lists these typical values at the specified 35°C test condition and 15 J/TH efficiency. Actual performance varies with operating conditions and manufacturer tolerances. The external cooling system consumes additional power.

What a 395T installation needs

Hydro cooling requires a compatible coolant loop, heat rejection equipment, electrical supply and network connection. The installation must be checked against the exact machine manual before purchase. A hydro miner is not a standalone appliance for a regular household outlet. Pumps and external cooling fans can produce noise; evaluate the complete installation.

One machine or a larger deployment

Tell Captain Mining your quantity, target installation date and whether you need delivery or hydro ASIC hosting. Request a written quote identifying the exact variant, equipment price, delivery, installation, electricity billing, cooling charges, maintenance terms and any deposit. Availability and deployment timing must be confirmed for your order.

The product price is for the selected equipment configuration. Hosting, installation and other services are included only when expressly stated in your written quote. Mining revenue changes with network conditions and coin prices and may be lower than operating costs.

Plan my 395T purchase and hosting

Technical reference: BITMAIN S21+ Hyd. product manual. Specifications reviewed September 11, 2026.