TechSpot has posted a guide about how to Volt-mod your GeForce4
Save those big bucks and bring new life to your GeForce4 Ti4200 videocard. We explain you in a detailed article how to voltage modify your Ti4200 board in order to achieve speeds above those found on the more expensive Ti4600's.Read more
In our tests we were able to clock a vanilla Gainward board @ 340/650 MHz; making a total gain of over 30% for both core and memory speeds.