Some ASUS graphics cards have a single zone RGB controller attached to the first GPU I2C interface which enumerates at either address 0x29, 0x2A, or 0x60 depending on model. Communication is done using standard 8-bit I2C chip register addressing.

Registers

Register Value	Register Description
0x04	Red
0x05	Green
0x06	Blue
0x07	Mode
0x0C	Sync
0x0E	Apply
0x20	Fixed 0x15
0x21	Fixed 0x89

Modes

Mode Value	Mode Description
0x01	Static
0x02	Breathing
0x03	Flashing
0x04	Spectrum Cycle