The guys over at Tech ARP have a very interesting read on how to SoftMod your GeForce to a Quadro.
Soft Modding a GeForce card to a Quadro has been around for a long time as most people simply cannot afford the professional version of the nVidia cards. However the GeForce and Quadro are very similar in terms of Core Hardware so this little warranty busting fix has maintained popularity.
Tech ARP takes an 8800GTS and mods it into a Quadro FX4600 with performance numbers to show if there are any real gains to be had.
Read more here.
After rebooting your PC, Windows XP/Vista will detect your GeForce card as a Quadro. Install the latest NVIDIA Quadro driver which you had already downloaded earlier. Then reboot the PC again for the driver to complete its installation.
The next time you boot up, your GeForce graphics card will start using the NVIDIA Quadro driver and you should be able to benefit from a tremendous performance boost in your favourite 3D rendering application.
To verify, you can run GPU-Z again. It should now identify your graphics card as a NVIDIA Quadro. In this example, you can see that my NVIDIA GeForce 8800 GTS is now identified as the NVIDIA Quadro FX 4600!