The VNISH team has released a new stable firmware version 1.3.3 for Antminer ASIC miners. The update features a major expansion of model support, new power management tools, improved hardware protection, new API routes and a large number of stability fixes. Vnish version 1.3.3 is aimed at both home miners and large mining farms that prioritise stability, power consumption control and flexible hardware configuration.
This release places particular emphasis on Hydro systems, automation, power supply security and optimisation for the Antminer S21, S21 XP, S21 Pro and S19 XP+.
You can download the Vnish 1.3.3 firmware from our website via the link.
New Antminer models in VNISH 1.3.3
One of the main updates is the expanded support for new ASIC miners and hash boards.
New supported models:
Air cooling
- ► Antminer S19 XP+
- ► Antminer S21 Pro
- ► Antminer S21 XP
Hydro series
- ► U3S21EXPH
- ► S21e Hydro
- ► U3S19XP+H
- ► S21+ Hydro
- ► S21 XP Hydro
Support for new revisions of hashboards and sub-models for the S19j XP, S19k Pro, S21+, S21 XP, S21 Pro and Hydro series has also been added to the firmware. This is particularly important for miners who were previously unable to install Vnish due to incompatibility with specific board revisions.
Power Limit in VNISH
One of the most important new features is Power Limit. Users can now set a strict power consumption limit in watts, after which the firmware will automatically reduce frequencies and voltage to keep the miner within the specified limit.
This allows you to:
- ► Limit the load on the power grid;
- ► Stabilise the farm’s operation;
- ► Avoid overloading circuit breakers;
- ► Operate within tariff limits;
- ► Quickly adapt the ASIC to the available power.
This feature is particularly useful for large mining centres and containerised solutions.
New Throttle mode for power management
VNISH 1.3.3 also features a new throttle function. It allows you to manually scale the miner’s performance by percentage. For example, a 200 TH miner can be instantly switched to 100 TH mode without completely shutting down the device.
Advantages of the new mode:
- ► Rapid reduction in load;
- ► Energy savings;
- ► Flexible farm balancing;
- ► Stabilisation during power outages;
- ► Ability to adapt to generators or grid restrictions.
A separate API route /mining/throttle has also been added for automation.
Improvements to Hydro and Immersion systems
In the VNISH 1.3.3 release, the logic behind hydro cooling has been significantly updated.
What has changed:
- New temperature protection. For all Hydro and Immersion models, the critical temperature is now automatically set to 80°C after firmware installation.
- Power supply temperature monitoring. The firmware now monitors the power supply temperature and automatically reduces presets if the PSU overheats.
- Minimum water temperature. A separate setting for the minimum water temperature required to start the miner has been added.
- New Cooling Widget. A separate cooling widget has been added to the interface for Hydro and Immersion systems.
Stability and autotune improvements
In VNISH 1.3.3, the autotune algorithms have been significantly updated.
Key improvements:
- ► Improved stability during overclocking;
- ► More precise voltage control;
- ► Reduced voltage offset;
- ► Improved logic for checking temperature sensors;
- ► Faster preset adaptation;
- ► Correction of global settings.
The VNISH team has also fixed the Random DevFee penalty issue, which sometimes caused the system to behave erratically.
Offline Mining in VNISH
The new version includes an Offline Mining mode. Now the miner can continue operating even without internet access. However, the hashrate is not sent to the pool until the connection is restored.
This feature may be useful for:
- ► Unstable networks;
- ► Remote mining sites;
- ► Equipment testing;
- ► Local diagnostics.
New logic and diagnostics features
VNISH 1.3.3 has been updated with new tools for in-depth monitoring of ASIC operation.
Added features:
- Retune on chain break. The firmware can automatically perform a retune upon detection of a chain break.
- Allow disable chain without PICs. The ability to disable boards even without PIC controllers has been added.
- Preset Tuning Timestamps. The interface now displays the completion date of the autotune for each preset.
API updates in VNISH 1.3.3
In VNISH 1.3.3, the team has significantly updated the API for automating and integrating miners into third-party monitoring systems. New routes have been added: locate-miner, boards and /mining/throttle, which allow you to control the miner’s LED indicator, obtain detailed information about hash boards and adjust ASIC performance without stopping it.
The release also includes a clean-up of obsolete API methods. The find-miner method has been marked as deprecated, the /chips route has been completely removed, and the remain_stopped_on_reboot field has been renamed to restore_miner_state_on_reboot for clearer operational logic.
The API update makes VNISH more convenient for large mining farms, automated control systems and custom monitoring solutions, providing greater control, stability and flexibility when working with ASIC miners.
Bug fixes in VNISH 1.3.3
The release also includes a large number of bug fixes.
Key fixes:
- ► Improved time synchronisation via pool.ntp.org;
- ► Fixed removal of the serial number after a factory reset;
- ► Fixed cloning of settings;
- ► Fixed dashboard freezing when working with third-party monitoring services;
- ► Fixed saving of configurations;
- ► Improved display of network settings.
Features that have been removed:
- ► higher-volt-offset;
- ► Widget settings;
- ► Manual selection of Modded PSU.
This has made the interface cleaner and simpler for users.
Why you should upgrade to VNISH 1.3.3
This release not only adds support for new Antminer and Hydro models, but also includes a host of improvements aimed at stability, security and flexible control of ASIC miners. The VNISH team has significantly updated the autotune, power management and API mechanisms, making farm operations more controllable and predictable even under heavy loads.
The new version places particular emphasis on power consumption and equipment protection. The new Power Limit and throttle features allow miners to be quickly adapted to available power, mains restrictions or data centre requirements. For Hydro and Immersion models, additional temperature protection mechanisms, PSU monitoring and new cooling system startup parameters have been added, which is particularly important for large mining sites.
VNISH 1.3.3 also significantly improves integration and automation capabilities. An updated API, new routes for managing miners, and enhanced diagnostics allow for the creation of more flexible monitoring systems and the centralised management of large numbers of ASIC devices. Together with dozens of bug fixes and improved stability, this makes VNISH 1.3.3 one of the most feature-rich and stable firmware releases for Antminer to date.
If you have any further questions regarding VNISH 1.3.3, firmware configuration or the compatibility of your Antminer, you can always contact our technical support. Visit our VNISH Telegram channel for advice and assistance with miner configuration.