I am afraid to say that we as Intel® do not handle a list of compatible video card that can be used with our motherboards.
However, I recommend you doing the following:
1. Take the system outside of the chassis. Make sure you disconnect all other components from the motherboard and take the product out in a non-conducted surface.
2.Clear the CMOS. The correct way is, while having all components disconnected from the motherboard, disconnect the BIOS jumper and remove the battery for about 15-20 minutes.
3. You mentioned that you have the BIOS updated to the latest version. Just in case,, you can try flashing it gain using the file that can be downloaded at the following link:
4. Tested a different power supply. Based on the card specifications, it is necessary a 500w power supply to use it. Testing a higher power supply will help us to discard any possible power issue.
5. Search for the latest firmware for your graphics card.
If doing these basic troubleshooting steps is still not working in the DP45SG, there might be a compatibility issue between these components.
i forgot ot reply to this thread so here goes.
i returned the board and got my 54 dollars back. i could have changed the video card, but i didnt want the FP connectors and Sata connectors getting blocked by the graphics cards. im going to see if an Intel DX48BT2 will work with the gigabyte card i have.
i really REALLY hate it when manfactures play this dumb game of trying to get products compatible either for money or just because they dont put so much effort into it.
and i hope that intels socket 1155 and 1150 boards wont be doing this.