please help me on hp z800 clover El Capitan

Hi,
I have tried all possible knowed solution with clover El Capitan on my z800.
Everytime i start the installation with USB key the system start on Clover Splash screen and after the boot go black screen. i 1 minuts after the system reboot.
Configuration:

hp z800
2 x x5680 processor (6 core)
48 Gb RAM
Nvidia quadro 6000
1 HDD 256 GB sata
1 DVD

Please Help me!!! I have tried options -x -v -f UsbBootFix=Yes nv_enable=no in every mode.