I love Nvidia guys with the new driver. Luigi this is for you too. I have been at the hospital last night. But this morning a ihad a brilliant idea. And now it works. Nvidia has made the impossible. Now i'm running my Asus Extreme IV i7. With Nvidia 8400GS and Nvidia 590 without EFI strings or DSDT inject Video. Two cards in the same system without Child and Parent. I think this is great.
I can't check in the Z800 because is working. I have to wait that you check in your machine and see if the audio works now with the new driver.