Gigabyte X79 Mavericks update Install stuck on Apple Logo

[wearespinning]

Gigabyte X79
i7 3930k
NVIDIA gt 640

Been using a working customac pro for over a year now with no problems. Now I am attempting to update Mountain Lion 10.8.3 to Mavericks. I able to get to the Mavericks installer then the computer reboots and I attempt to boot using the USB to run multibeast and I am stuck with the apple logo and spinning wheel. I have tried all the recommended boot flags I could find. npci=0x2000 PCIRootUID=1 doesnt seem to work (although it worked for installing Mountain Lion)

help is greatly appreciated
thanks

 

[Dragon546]

try npci 0x2000 GraphicsEnabler=No -v

also if you have V-TD and Intel Virtualisation enabled in your bios disable it

 

[wearespinning]

I tried npci=0x2000 GraphicsEnabler=No -v
VTD is disabled
still stuck at apple logo with the spinning wheel

:/