Hi all,
I use Sony Vegas for video editing and it supports GPU acceleration through OpenCL. Unfortunately this isn't supported very well by nVidia Geforce cards (Quadro being a different story) so would crash regularly. This was fixed by adding an AMD R9 270x to my comp, which I use only for Vegas, with my nVidia card running the display and games etc (would prefer to stick to nVidia due to power efficiency, and also 3D Vision, G-Sync etc).
Literally no problems in this config... except that I have to have the nVidia in the primary PCI-E 16x slot for the mobo to select it as the primary card for display. Due to wanting to make a custom case, I need to have the card on the second PCI-E slot right on the edge of the board (Asus ROG Maximus IV Gene). Works fine if the nVidia card is plugged in by itself, but adding the AMD card to the primary slot messes things up and takes over as the main display card.
So, my question is: is there any way to change which PCI-E slot on the motherboard is treated as the primary slot for graphics? Either in the BIOS, or in Windows?