The new CFW comes with a custom kernel that allows the Rockchip processor to safely throttle up from 1.5GHz to 1.8GHz (with active cooling management). This results in:
Use this method if you want to run the firmware from an SD card without wiping the internal memory, or if the custom firmware is designed for SD boot.
Boot:
After the update, you’re not quite done. To get the best performance, follow these tweaks:
Use this method if the firmware file ends in .img or .iso and you are flashing the internal storage.
Load the Firmware:
Connect the Device:
Flash:
Before downloading anything, you must confirm exactly which version of the X12 Plus you have, as firmware is often not interchangeable.
You will need two specific things: the Firmware Image and the Flashing Tool.
The Custom Firmware:
The development team (active on GitHub and Reddit’s r/SBCGaming) has pushed a massive update as of late 2024/early 2025. Here are the headline features:
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