Evga Voltage Tuner

[mikeyakame]

on the gtx 285 (ISL6327CRZ) nvidia most probably connected some GPIO pins to the VID input pins but this will give you like 3 or 4 selectable voltages in a rather small range. it will definitely not be what you can get with the i2c based chips.

That makes a lot of sense Wiz!

Something along those lines would be executed by controlling say 3 or 4 dedicated GPIO pins which would be used to assert/deassert the VID pins based on the required voltage table bit mask to obtain 3 or 4 preset Performance Level VIDs? Ie. use different open GPIO pin combination to get 4 bit mask range, 00 01 10 11 of which each has a preset VID entry to connect VID0-VID7 pins based on what Voltage Table mask is needed to output each performance level voltage.

I'm not all that knowledgable on the GPIO functionality so I've just taken a stab at how i think it may be done, feel free to correct me if i've missed the target heh.