Thanks so much bro
I didn't know that DFI's site still working right now!
This is a good news but in the same time a bad news for me!
Because this evening I have flashed the last bios version from this website:
http://www.lejabeach.com/DFI/790FXM2RS/
And my main board won't boot!
Next time I will ask you before!
Now I have to try spi flash bios
Edit: Now i have see that the bios version that I have used is for 790fx and not 790fxb
My guilty