Memory Volt-Mod

First, I want to show you the points where you can monitor this voltage:

These points are convenient for the bottom PCB, but what to do with the top one? You should go right to the regulators: the voltage is monitored on the outputs of the filtering coils:

By default, the GDDR3 memory works at 1.9V on this graphics card.

To increase the voltage, you should solder a 10,000Ohm variable resistor in parallel to the resistor marked in the picture and reduce its resistance.

The resistor can be replaced with a pencil mod: the reduction of the resistance from the original 585Ohms to 525Ohms helped increase the voltage to 2.05V. Before the modification, the memory on my sample of the graphics card was stable at 830MHz at best. After the voltage increase, it worked at 880MHz. I think this is not the limit because the chips were under very harsh thermal conditions.

The graphics card wasn’t benchmarked before or after the modification due to the reasons explained above.