X-bit Labs reports how to mod your GeForce 4 boards to turn it into a Quadro4! Actually it is quite simple. The differences between Quadro4 and GeForce4 will be only in the driver support. That is why all you need to do to install the Quadro4 drivers for your GeForce4 graphics card is to change the chip ID.

On the reference GeForce4 Ti4600 card the 10kOhm resistor is set into "A" position. If you move it to "B", then the card will be identified as NVIDIA Quadro4 900XGL. As a result, the GeForce4 Ti4400 card obtained from GeForce4 Ti4600 as described above, will turn into NVIDIA Quadro4 750XGL, and NVIDIA GeForce4 Ti4200 ? into NVIDIA Quadro4 700XGL.

X-bitlabs.com NVIDIA GeForce4 Ti4600 To Quadro4 MOD