It'd be great to pull GPU info similar to GPU-Z and edit it, but radeonvolt only supports reference 5xxx series cards currently. Until the lack of more diverse I2C code is expanded upon, its utility is virtually nil for 6xxx and non-reference cards in general.
Messing with I2C is dangerous, proper code verification is needed to not harm hardware - as the looks of now radeonvolt - supporting only reference 5000 series seems in general not vital for normal users!
Back to topic please!