Some HP's don't accept some cards. And then we have GPUs that need a power connection to work. Finally we have issues where the owner didn't connect the display to the new card.
When running off my motherboard I get a shoddy picture but when I put my GPU in and turn the PC on I get no signal on the screen. I tried downloading and installing the appropriate drivers from the Nvidia website but without the hardware I can't install them. Does anyone know how to fix this? Thanks