About the Product
Restore optimal mining performance with the brand new Bitmain Antminer S21 and T21 Control Board. Featuring the Ctrl_C76 version and powered by the advanced Amlogic A113D main control chip, this reliable control board is designed specifically for repairing and replacing faulty S21 units.

Seamless Repair and Replacement for S21 and T21 Miners
Eliminate common issues such as IP detection failure, backend access problems, and hash board recognition errors. Prompt replacement minimizes downtime and prevents potential mining losses. Our control boards are original, brand new, and manufactured with premium materials to ensure durability and high efficiency.

Technical Features