Bitmain Antminer T21 (190Th) firmware

Official firmware versions matched to the exact ASIC model or manufacturer family. Local copies include SHA-256 checksums.

Firmware is hardware-specific. Match the exact model and control-board revision, back up settings, use stable power, test one miner first, and never interrupt an upgrade. A wrong image can make the controller unbootable.

Official manufacturer firmware

1 versions

Exact model Official source: BITMAIN Product Manual & Firmware ↗

Version	Published / updated	Compatibility	Size	SHA-256	Download
FR-1.20FR-1.20(251113-T21).bmu	2025-11-18	ANTMINER T21	44.7 MB	`—`MD5: 518f735ca49e7e0d7cb6e8d7ceb26610	Official listing; local copy unavailableOfficial source ↗
Release notes: MD5:518f735ca49e7e0d7cb6e8d7ceb26610 Updates： 1. For the machines that may shut down due to high temperatures, some optimization strategies, such as frequency reduction, are implemented, which may cause a loss of computing hashrate. 2. Optimized the stability of mining machines under low ambient temperature conditions. Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

Verify the downloaded file with SHA-256 before uploading it to a miner.

Sources checked 14 September 2026