The Tesla (2xx/3xx) and Fermi (4xx) series of GPUs can be modified by modifying the BIOS. Earlier cards can also be modified, but the modification is slightly different to what is described in this article. There is no hardware modification required on any of these cards. The modification is performed by modifying what is known as the “straps” that configure the GPU at initialization time. The nouveau project (free open source nvidia driver implementation for Xorg) has reverse engineered and documented some of the straps, including the device ID locations. We can use this to change the device ID the card reports. This causes the driver to enable a different set of features that it wouldn’t normally expose on a gaming grade card, even though the hardware is perfectly capable of it (you are only supposed to have those features if you paid 4-8x more for what is essentially the same (and sometimes even inferior) card by buying a Quadro).
il post originale della modifica NVidia
esempio di configurazione