ga-z77x-up5 th---white screen installing High Sierra

[hackintoshboy]

GA-z77x-up5 th 32GB ram 2TB HARD DRIVE
Sapphire hd 7950 radeon card


I can't seem to get thru the install. The apple comes up from the boot usb, the load line goes to the end then a white screen appears with a mouse curser in upper left corner, then the curser goes to a rainbow spinning circle and thats all that ever happens.

I have been thru the forums for two days. I have tried below singly and together:
PCIRootUID=0 and 1
GraphicsEnabler=Yes and No
IGPEnabler=Yes
Mode=1920x1080x32

Changed bios Init display first=IGFX
Internal Graphics=disabled

Nothing I have tried has made any difference at all.
I know someone out there has my MB and the 7950 card. Please what did you do to make it work??? Help

10-26-18 I fixed the problem. It was not the video card like i thought. This MB ga-z77x-up5 th requires the video card to be in the first PCI-E slot. I had it in the third. Moved it to 1 and white screen problem went away and the install finished.
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Thanks to P1lgrim for moving my post to the correct Q and reminding me to update my profile.

 

[P1LGRIM]

Does not require Buying Advice - Moved to Desktop Support.

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