The Bitmain Antminer T21 represents a notable advancement in Bitcoin mining technology, offering up to 190 TH/s hash rate with an efficiency rating of 19 J/TH. While slightly less efficient than its predecessor, the T21 remains a powerful option for miners seeking a balance of performance, energy efficiency and acquisition cost. Developed in collaboration with TSMC and featuring state-of-the-art 5-nm chips, the T21 showcases Bitmain's ongoing dedication to enhancing mining hardware. With its robust design and impressive hash rate, the Antminer T21 stands as a reliable choice for bitcoin miners worldwide.