[Alienware M15x 940XM and 780m GTX] Bios m15x unlocked and vbios 780m modified

Hello,
i have an alienware m15x (i7 940xm and 780m gtx) at home.
I just mounted a 780m gtx that comes from a msi.
I managed to install the driver (modd) nvidia.

But voila, I have a white screen when starting and stopping the machine.
I changed the vbios by putting that of svl7 but it did not change anything.

Do you know if someone here can make me a custom vbios for my config?

I am also looking for a bios for my alienware.
a bios unlocked at the cpu voltage and frequency.

Do you know if we can do that on this model?