Nvidia GTX Titan X – External Power Guide
5. Memory FB-Mod
Since we are using the stock memory VRM you can just apply a normal FB-Mod to increase the memory voltage. Replace the resistor in the picture above with a 10 kOhm trimmer set to 3.09 kOhm. If you increase the resistance it will increase the memory voltage.
Removing the small resistor you should have a resistance in circuit of about 17.4 kOhm. Just for reference.
Now take your trimmer and set it to about 3.09 kOhm. If you got that – solder it on.