8800GTS 320MB Pencil Voltage Mods

Unfortunately for GPU core voltage, due to the small resistance of the resistor, it is quite impossible to tune voltage with a pencil mod. You will need to solder a 500 ohms Variable Resistor to the spot marked and hook the other leg to any grounded spot. Set VR at Maximum Resistance and tune down resistance to increase voltage.

Ok, so you got this at your fingertips, simple stuff really, now just dump plenty of cooling onto the card and I'm quite sure you will see a substantial increase in overclocks. Eventually, this card is modified the exact same way as the original 8800GTS 640MB.
http://www.vr-zone.com/?i=4641