I just bought a used, custom-built desktop. It has:
nVidia nForce 750i SLI Mainboard
nVidia GTS 250 GPU
Now, I have to manually install the drivers for both of these pieces of hardware. For the GPU, I have tried to install version 257.21, 258.96, and 275.33.
On both the 257.21, and 258.96...