Download the Latest ASICDIP Firmware for Antminer S21 Hydro – Instant Updates and Miner Optimization

Antminer S21 Hydro 1.2.6 rc3

Release 1.2.6 rc3

Installation

ASICDIP Firmware for Antminer S21 Hydro

IMPORTANT: This firmware is compatible only with the Antminer S21 Hydro.

Before installation, make sure you have the correct firmware version for your device.

Important Note:

Check the date of the stock firmware. If the stock BITMAIN firmware is from March 2024 or later, you need to downgrade the firmware version using the image from Series 21 (2024 Unlock) or Series 19 (Stock Firmware) for your model and control board type.

Available Firmware Versions:

Firmware for all models can be found here: Firmware for All Models

Firmware Installation Guide

To install the firmware, use an SD card (maximum 16GB, FAT32 format).

1. Download the Firmware: Download the firmware file for your Antminer S21 Hydro control board version (the board version is indicated on the white label on the board cover). Unzip the archive and transfer the files to the SD card.
2. Insert the SD Card: Insert the SD card with the ASICDIP firmware into the device and turn on the miner.
3. Return to Stock Firmware: If you remove the SD card, the device will return to the stock BITMAIN firmware.
4. Firmware Update: For firmware update, download the web version of the firmware and upload it via the UPGRАDE function.
5. Power Supply Update: If the miner's power consumption exceeds 4600 watts, update the power supply according to the modification instructions.

How to Flash Directly to NAND Without an SD Card

IMPORTANT: If you want to flash the Antminer S21 Hydro with a Zylinx (xilinx) control board directly to NAND memory without using an SD card, use the TOOLKIT PACK for automatic firmware installation on your devices.

NAND INSTALL: To install the firmware, you must use TOOLKIT. If you are unsure about the model and type of your control board, download the guide for models and board types here.

To get started, download the TOOLKIT PACK (includes firmware for all models). TOOLKIT PACK will automatically select the necessary firmware during installation.

You can also download the TOOLKIT installation file and select the firmware for your control board model and type. Firmware files are available here.

Presets for Series 21, 19, and L7 can be found here.

How Firmware File Names are Decoded

Example: asicdip-s19-88-xil-sd-v1.2.0-rc4-update

For general understanding of which files to use:

There are several types of firmware files available for this miner model:

Installation Files (install): Used to install firmware onto the device. If you are installing firmware over the stock version, use the file labeled install.
Update Files (update): Used to update previously installed firmware. If you are updating the firmware, use the file labeled update.
Files for NAND Installation: These files are installed directly to the control board's memory. Example of a file: asicdip-l7-xil-nand-v1.2.6-rc2-install.tar.gz.
Files for Installation via SD Card: Used for installing firmware from an SD card, available for certain types of control boards. Example of a file: asicdip-l7-xil-sd-v1.2.6-rc2-install.tar.gz.

Additional Information on Decoding the Firmware File Name:

asicdip: Brand name of the firmware.
l7: Antminer model.
xil: Control board type: based on Zylinx processor.
nand: Firmware installation to the control board's memory without using an SD card.
sd: Installation method via SD card (available for all users).
v1.2.6-rc2: Firmware version (release candidate 2).
install: Firmware file type for installation on the device.
update: Firmware file type for updating the already installed version.

Firmware for Antminer models

Other available models and firmware:

1. Antminer L7: Firmware for the Antminer L7 model to optimize performance and enhance reliability. Installation is possible on control boards: xil.
2. Antminer S19: Firmware for the Antminer S19 to improve performance and stability. Installation is possible on control boards: xil.
3. Antminer S19 (126): Firmware for the S19 (126 chips) model for control boards: aml, cv, with optimization to increase hash rate. Installation is possible on control boards: aml, cv.
4. Antminer S19 (88): Firmware for the Antminer S19 (88 chips) with processors: aml, bb, cv, xil (Xilinx) and installation on an SD card for maximum performance. Installation is possible on control boards: aml, bb, cv, xil.
5. Antminer S19 Hydro: Firmware for the Antminer S19 Hydro model with efficient liquid cooling to improve performance. Installation is possible on control boards: xil.
6. Antminer S19A: Firmware for the Antminer S19A model, providing stable operation under heavy loads. Installation is possible on control boards: xil.
7. Antminer S19 A Pro: Firmware for the Antminer S19 Pro A model with additional settings for maximum stability. Installation is possible on control boards: xil.
8. Antminer S19e XP Hydro: Firmware for the S19e XP model with liquid cooling to improve efficiency. Installation is possible on control boards: xil.
9. Antminer S19i: Firmware for the S19i model with enhanced features to optimize mining. Installation is possible on control boards: xil.
10. Antminer S19J: Firmware for the S19J model to increase hash rate and mining efficiency. Installation is possible on control boards: bb, cv, xil.
11. Antminer S19J Plus: Firmware for the S19J Plus model with optimization for high stability. Installation is possible on control boards: aml, bb, cv, xil.
12. Antminer S19J XP: Firmware for the S19J XP model with enhanced settings to increase performance. Installation is possible on control boards: aml, cv, xil.
13. Antminer S19J Pro: Firmware for the S19J Pro model with Xilinx processor for improved performance. Installation is possible on control boards: aml, bb, cv, xil.
14. Antminer S19J Pro A: Firmware for the Antminer S19J Pro A model with additional settings for maximum stability. Installation is possible on control boards: aml, bb, cv.
15. Antminer S19J Pro Plus: Firmware for the S19J Pro Plus model with optimization for high stability. Installation is possible on control boards: aml, bb, cv, xil.
16. Antminer S19K Pro: Firmware for the S19K Pro model with settings for improved stability. Installation is possible on control boards: aml, cv.
17. Antminer S19 Plus: Firmware for the S19 Plus model with settings to increase hash rate. Installation is possible on control boards: xil.
18. Antminer S19 Pro: Firmware for the Pro version of the Antminer S19 to improve performance and reliability. Installation is possible on control boards: xil.
19. Antminer S19 Pro A: Firmware for the Antminer S19 Pro A model with additional settings for maximum stability. Installation is possible on control boards: xil.
20. Antminer S19 Pro Hydro: Firmware for the S19 Pro model with liquid cooling to improve thermodynamic efficiency. Installation is possible on control boards: xil.
21. Antminer S19 Pro+ Hydro: Firmware for the S19 Pro+ with liquid cooling to stabilize operation under high load conditions. Installation is possible on control boards: xil.
22. Antminer S19 XP: Firmware for the S19 XP model with Xilinx processor and SD card installation for reliable operation. Installation is possible on control boards: aml, cv, xil.
23. Antminer S19 XP Hydro: Firmware for the S19 XP model with liquid cooling to increase performance. Installation is possible on control boards: xil.
24. Antminer S21: Firmware for the S21 model with improved energy efficiency. Installation is possible on control boards: aml.
25. Antminer S21 Hydro: Firmware for the S21 Hydro model with improved cooling features. Installation is possible on control boards: xil.
26. Antminer S21 IMM: Firmware for the S21 IMM model with installation for immersion cooling. Installation is possible on control boards: aml.
27. Antminer S21 Pro: Firmware for the S21 Pro model to increase performance and stability. Installation is possible on control boards: aml.
28. Antminer S21 XP: Firmware for the S21 XP model with enhanced settings to improve performance. Installation is possible on control boards: aml.
29. Antminer S21 XP Hydro: Firmware for the S21 XP model with liquid cooling to improve thermodynamic efficiency. Installation is possible on control boards: xil.
30. Antminer S21 XP IMM: Firmware for the S21 XP IMM model with installation for immersion cooling. Installation is possible on control boards: aml.
31. Antminer T19: Firmware for the Antminer T19 model, optimized for high performance. Installation is possible on control boards: xil.
32. Antminer T19 Hydro: Firmware for the Antminer T19 Hydro model with improved liquid cooling features. Installation is possible on control boards: xil.
33. Antminer T19 Pro Hydro: Firmware for the T19 Pro Hydro model with enhanced performance and cooling. Installation is possible on control boards: xil.
34. Antminer T21: Firmware for the T21 model to increase performance and stability. Installation is possible on control boards: aml, cv, xil.

How to Update Firmware on Multiple Devices

For bulk installation of firmware directly to the NAND memory for the Antminer S21 Hydro without using SD cards, use the instructions in the Toolkit archive.

WARNING: If the stock BITMAIN firmware is from March 2024 or later, you need to downgrade the firmware date using the image from the Series 21 or Series 19 for your model and control board type.

Firmware for all models is available at this link.

To install the firmware: Download and use the TOOLKIT PACK, which will automatically select the necessary firmware for your model and control board type. If you don't know your model and type, check here.

You can also download the installation file TOOLKIT 1.2.0 and the firmware file for NAND installation from this link, by selecting the latest release.

Presets for Series 21, 19, and L7 can be found in this PDF file.

Unblocking SSH Energy Consumption Table
Mass Firmware Installation Utility Bitmain APW-12 Modifications
Update Antminer S21 Hydro Release 1.2.6 rc3 Install SD Antminer S21 Hydro Release 1.2.6 rc3

Modes

Custom settings for Antminer S21 Hydro

Mining Output: Energy Consumption
148 TH: 2500 watts (16.89 W/TH)
160 TH: 2700 watts (16.88 W/TH)
173 TH: 2900 watts (16.76 W/TH)
185 TH: 3120 watts (16.86 W/TH)
197 TH: 3300 watts (16.75 W/TH)
210 TH: 3450 watts (16.43 W/TH)
222 TH: 3620 watts (16.31 W/TH)
235 TH: 3850 watts (16.38 W/TH)
247 TH: 4000 watts (16.19 W/TH)
259 TH: 4160 watts (16.06 W/TH)
272 TH: 4370 watts (16.07 W/TH)
284 TH: 4580 watts (16.13 W/TH)
297 TH: 4780 watts (16.10 W/TH)
309 TH: 4980 watts (16.11 W/TH)
321 TH: 5360 watts (16.70 W/TH)
334 TH: 5450 watts (16.32 W/TH)
346 TH: 5600 watts (16.18 W/TH)
359 TH: 5800 watts (16.16 W/TH)
371 TH: 6050 watts (16.31 W/TH)
383 TH: 6300 watts (16.44 W/TH)

Profiles for the x21, x19, and L7 series can be found here.

Timeline of changes and improvements by releases

Release: 1.2.6 rc3

Downloaded: 0

Date: 12.01.2025

Size of the firmware Update: 0.0 Mb

Size of SD image Install: 0.0 Mb

Hash Sum of the firmware: d41d8cd98f00b204e9800998ecf8427e

Hash Sum of SD image: d41d8cd98f00b204e9800998ecf8427e

Update download 1.2.6 rc3 Install SD download 1.2.6 rc3

What's new:

Firmware for all models is available at this link.
To install the firmware: Download and use the TOOLKIT PACK, which will automatically select the required firmware for your model and control board type. If you do not know your model and type, check here.

New Features

Chip Power Regulation

Now available for the x21 series (except S21 Pro).

Expanded Miner Support

Antminer T19 Pro Hydro
Antminer S21 XP
Antminer S19j XP
Antminer S19e XP Hydro
Antminer S21 XP Hydro
Antminer S21 XP Immersion
Antminer T21 with Xilinx controller

Preset Switcher

Added options to ignore fan speed and automatically lower the top preset.

Power Supply Update

Added power supply model name for 0x64.

Pool Updates

Default pools updated for Antminer L7.

Patented Chip Throttling Technology

Now includes hashrate compensation using cooler chips to maintain high performance.

Chinese Language Support

Added the ability to work with the interface in Chinese.

Power Consumption Graphs

Added power consumption graphs for the device.

Chip Marking

x21 series chips now have markings for frequency adjustment due to overheating.

Maximum Fan Speed

Added the ability to configure maximum fan speed in auto mode.

Automatic Interface Language Selection

The interface automatically selects the language based on system settings.

Minimum Preset for Autoswitcher

Added a minimum profile option for automatic switching.

Improvements

Autotune Algorithm

Now more efficient.

Default Voltage

Reduced for Antminer S19 XP.

Preset Updates

New presets added for Antminer S19j Pro+ and S21.
Presets fixed for Antminer L7 and S19i.
Presets fixed for Antminer S19e XP Hydro and S19 (76 chips) with Xilinx controller.

Accelerated EEPROM Reading

Faster data reading on all control boards except Xilinx controllers.

Improved Power Supply Compatibility

Enhanced compatibility with various power supply models.

Power Consumption Graph Accuracy

Significantly improved.

UI/UX Updates

Include various user interface enhancements.

Firmware Security

Strengthened with additional measures against brute-force attacks.

Full System Reboot

The system now requires a full reboot when changing the time zone.

Bug Fixes

Sensor Readings

Fixed issues with reading sensor values for S21 Pro.

Cooling Modes

Fixed prolonged cooling periods in immersion and Hydro modes.

Voltage Return

Fixed an issue with voltage adjustment.

Pool Configuration Errors

Fixed issues in User and DevFee pool configurations.

Network Test Failures

Fixed network test failures after network settings changes.

Hashrate Display Issues

Resolved incorrect hashrate display when reducing chip frequency.

EEPROM

Fixed random data corruption and reading errors.

API Changes

Active Chains Only

API responses now include only active chains. Disconnected or disabled chains are excluded.

New Fields Added

hr_nominal — for theoretical hashrate
build_uuid and build_name — in info requests
power_consumption — in metrics requests
throttled — in chips requests

Chronology of changes by release.

Firmware