NVIDIA 7900GTX, 7900GT & 7600GT Voltage Mods

On top of our in-depth reviews of the newly launched 7900
and 7600 series of GPUs, we have also looked into the voltage regulation
on each of these cards and we bring to the overclocking community the first
Voltage modifications guide in the world for these cards! For the 7600GT all you need is a humble pencil to do it!

On top of our in-depth reviews of the newly launched 7900
and 7600 series of GPUs, we have also looked into the voltage regulation
on each of these cards and we bring to the overclocking community the first
Voltage modifications guide in the world for these cards!

First of all, please ntoe that all these hard modifications
to your hardware will void the warranty for them immediately so do them at your
own risk and with this knowledge!

Now for those relatively new to hard modifications, you are
welcome to check out VR-Zone’s mod
guide.

Let’s take a look at the 7600GT first:

With the back of the card facing you, look to the left of the
card and you will see the area pictured above.

You can measure GPU Voltage and Memory Voltage from the points
marked above with your multimeter. GPU Voltage runs at 1.3v in 2D mode and
rises to 1.36v in 3D, while Memory voltage remains at 2.02v constant.

For VGPU increase, look for the resistor circled. Original
resistance is 415 ohms. Use a sharp pencil and shade the resistor to decrease
it’s resistance. Dropping the resistance to 385 ohms from 415 ohms increases
3D voltage from 1.36v to 1.46v. Alternatively, you can solder a 10K ohms variable
resistor across the resistor, set at maximum resistance of 10K ohms. Lower resistance
to increase voltage.

For VMem increase, look for the resistor circled and labled
VMem. Original resistance is 625 ohms. Use a sharp pencil and shade the resistor
to decrease it’s resistance. Every 25 ohms drop in resistance increases Memory
voltage by 0.1v. Alternatively, you can solder a 10K ohms variable resistor
across the resistor, set at maximum resistance of 10K ohms. Lower resistance
to increase voltage.