About the Product
The Antminer S21 Hydro Control Board C59 C89 is the ideal replacement and repair solution for the Antminer Hydro series, specifically designed for the S21 model. This control board ensures smooth, reliable performance and optimal mining functionality.

Maximize Profitability and Efficiency
For best results, flash the firmware matching your miner model before installation. The control board’s main role is to manage hash board data communication, which is critical for maintaining your mining profitability.

Key Features of the S21 Hydro Control Board C59