[EDIT, RESOLVED] Used EasyUEFI on my working Windows partition to add a new boot option. Reference thread.
I had a similar issue and disabling the Mac OS drive's SATA port in my BIOS solved my Win10 installation issues. However, after re-enabling my Mac OS drive's SATA port, my UEFI drives...
I was able to finally get past my display going to sleep upon initial log in by using PCIRootUID=1 rather than PCIRootUID=0.
Gigabyte UD4H
i7 4770k
EVGA GTX780 SC
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