Broadwell-E can't get Nvidia drivers to work

I installed Yosemite 10.10.5 and Clover using a different system, because I think that's necessary for X99 with >7 cores. I can't get it to boot past the Clover screen. Here's what I've tried so far:
- BIOS enable EHCI handoff
- Add FakeSMC and VoodooTSCSync to the EFI partition, and also to /S/L/E. Change IOCPUNumber to 19 to match core count.
- boot args: -v npci=0x2000 kext-dev-mode=1
- set fakecpuid=0x0306F2
- replace VboxHfs-64.efi with HFSPlus.efi
- Brumbaer's IOPCIFamily patch
-...

Broadwell-E can't get Nvidia drivers to work