Uspex Z11\Z15 Custom Firmware

⚡ Uspex Z11 Custom Firmware ⚡
Custom firmware for Antminer Z11
(based on Bitmain-compatible cgminer 4.9.0)

🎯 Main goal of the firmware:
Reduce Antminer Z11 power consumption by automatically adjusting voltage and frequencies per board, while maintaining a stable hashrate.

🔥 Key features

Frequency and voltage control individually for each hash board.
Autotuning for target hashrate.
Modes:

Stock — around 140 kSol
150 kSol
160 kSol

Automatic undervolt per board.
Saving of found profiles.
Improved web interface.
Hashrate display per board.
Separate display of board and chip temperatures.
Display of actual frequencies per board.
Manual fan control.

💸 Devfee is 2%.

⚙️ How Stock mode works
Stock mode no longer uses the unstable factory scan.

Algorithm:

Starts with base values 718 MHz / 870 mV.
Waits for the miner to warm up.
Collects hashrate statistics.
If the average hashrate is in the range 136–142 kSol, frequencies are not changed.

After that, undervolt begins.

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Voltage is reduced by 5 mV steps.
If a board loses hashrate, gets HW errors, or becomes unstable, the voltage for that board is rolled back.

Goal of Stock mode: keep stock performance around 140 kSol, but reduce power consumption.

🚀 150 kSol mode

Start values: 750 MHz / 880 mV
The algorithm first adjusts frequencies of active boards to reach the target hashrate, then reduces voltage per board individually.

🚀 160 kSol mode

Start values: 800 MHz / 900 mV

[warning]Important: for 160 kSol mode a 2000W+ power supply is recommended.[/warning]

Maximum limits:

frequency up to 800 MHz
voltage up to 920 mV

🧠 Autotuning logic
Autotuning works on active boards, regardless of their numbers.

Temperatures:

up to 85°C — considered normal
above 85°C — fans are set to 100%
above 90°C — considered critical

HW:

up to 10 HW per check window is considered acceptable

📊 Differences from stock firmware

added per-board overclocking
added per-board voltage
added automatic undervolt
added profiles Stock / 150 / 160
removed update restrictions
improved web interface
added manual fan control
added autotuning profile saving logic

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📦 Current version
Uspex Z11 Custom Firmware 2026 v3.7

File:
Z11-Uspex.tar.gz

⚠️ Installation recommendations

If you get a signature not found error when installing the firmware, follow the instructions below.

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Download the image (links below).
Extract it to a micro-SD card formatted as FAT32 with a size between 2 and 32 GB.
Unplug the miner from the power outlet.
Insert the SD card into the miner.
Turn on the miner.
Wait until the status LED next to the Ethernet port stops blinking (this means the firmware update completed without errors).
Wait 1 minute after the LED stops blinking, before turning off the miner.
Turn off the miner.
IMPORTANT! Remove the SD card.
Turn on the miner. The miner is now restored to factory settings and you can install any other firmware.

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📌 After flashing:
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Open the web interface.
Check pools.
Go to Autotune.
Click Clear Tuning Config.
Start the desired mode.

For the first test, Stock mode is recommended.

https://drive.google.com/drive/folders/1a7ZXBmln9CBDmkn0aQfKOfjdsUonyUZv?usp=drive_link

Autotuning is in beta stage. I ask everyone who uses this function to leave feedback on the results (hashrate/power consumption).

We are working on bug fixes and developing per‑chip control to improve performance/reduce power consumption.
Firmware for Z11e/J and all Z15 modifications is planned.
PS: If you have the ability to provide access to Z11e/J machines and all Z15 modifications, you will greatly help in the development of new firmwares.

Telegram group: http://t.me/firmware_uspex