Weird problem with new Nvidia Drivers

[BlueHeisenberg]

I have two TitanX maxwell with full WB from EK and with the "cyclops3" custom bios from this post.

 

Both of them worked perfectly in my system until I updated from the Nvidia driver 381.89 to a new one. After install and reboot the gpus appear in device manager with an alert and in properties says that there was a problem with the hw...

 

Then I tried to reinstall the old driver (381.89) and both cards worked perfectly

 

At that point I thought it could be the windows install that was messed up or something wrong in the MB or cpu as it was starting to feel the age of those components (3930k@4.8ghz in a rampage iv extreme).

 

After some time the computer suddenly got stuck at the bios boot process with error code 0d or something like this and it didn't pass through even with a clear cmos. So I guess the mb or cpu at that moment decided it was enough. I dismantled the computer and bought a new cpu+mb+ram (7900x + Rampage VI Extreme + 32gb ddr4 gskill 3600 cl17).

After a fresh windows install in a new ssd I proceeded to install the latest nvidia drivers and... The same happened! Device manager shows an alert and can't load the drivers on both of the gpus with the 388.43 driver...

 

I tried to install the 381.89 and it works. So it seems that I´m stuck in this driver

 

Does anybody had the same or similar issue? The only that I could think that is happening is that Nvidia for some reason decided to not support moded bios in older cards...