a couple of questions...

based on what Bail_w said,

so you set the VR to max (let say 500ohms), then solder it to the circuit. then adjust the resistance while the system is turn on and monitoring the vGPU readout? is that the correct way?
after i've done the soldering and reinstalled my card into the pci-e slot, what should the GPU resistor be set to (BEFORE turning on the power supply) ? 500ohm? 250ohms? 100ohms? 50ohms ?

also; what is the MAX recommended voltage we should be putting through the GPU ?

also, lets say i want to get a core of 900MHz.... what voltage do you expect will necessary to achieve this ?