The board is old enough that there are compatibility issues with the latest generation graphics cards. These cards have expectations of the board and BIOS that are beyond their capabilities. Some people, with certain cards, have been able to get around some of these expectations by enabling UEFI within BIOS Setup. Unfortunately, you will need to use an older graphics card in order to get into BIOS Setup and make this configuration change...
Thanks for the comment. Really appreciated!
Unfortunately, the UEFI boot option was already at on... If i'm doing it right!
It's weird... For the compatibility issues : my old mainboard is a cheap asus board with a cheap chipset and it is working well... I'm really surprised that an Intel board, that is expensive, not works with my video card!
I don't know what I'll do with this!
I’m sorry to hear about the issue you have, to me this seems like a compatibility issue with the motherboard and card, unfortunately Intel will not develop new BIOS versions to fix problems with third party components using this motherboard but some people fix this problem following some troubleshooting steps here.