Problem with Asus 7970DCII

Hello i have a problem with my Asus 7970DCII (non TOP), i flashed my second bios (left side switch) to unlock voltage to max 1.4v, and i didn't make a backup of original BIOS in switch 2.
Now i need to enable Dual Link DVI port for my 120hz monitor so i switch to BIOS n?2 but i cant enable Dual Link DVI for set 120hz at 1080p (i'm limited at 1024x768 for 120hz).
I can't find an original second BIOS for my 7970DCII (non TOP), can i receive some support?

Thanks a lot.