've put together a new PC for 3d modelling, rendering and illustration Its a threadripper 1950 with x399Taichi, and a 1080Ti. I also wanted to add a 780SC i have around so that CUDA based rendering will be almost twice as fast! The cards work fine on their own on different systems, but as soon as i put them together in the threadripper, the 780 displays the yellow triangle in the device manager and gives Code 43 If i decide to uninstall the card and reboot nothing changes. He eventually finds the drivers installs them (they are the same for the 1080 anyway) and nothing changes. If i decide to screen output through the 780, as soon as the nvidia drivers are installed the screen goes black. basically the 780 is detected but its a zombie dummy sitting by. If i remove uninstall the 780 it then shows up as VGA adapter displaying no errors.