hi guys. few more information about this build. i have the same config (with gtx 780 ti):
with 10.9.2 (without modified kernel)you can have a full vanilla installation. in my case, bios 4608 (latest), i have too boot with this flags to installa 10.9.2:
-v npci=2000 cpus=1
the installer goes very slowly. even the first boot is very slow because you are using only 1 cpu.
then, when you install multi beast with the correct options, everything work!
i have a 99% working system.
yeah, 99% because for now it is not possible to have a full working appleintelcpupoermangement , even with dsdt.