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Dual GTX 1080 and High Sierra issue

Joined
Nov 14, 2012
Messages
110
Motherboard
ASUS Sabertooth X99 TUF
CPU
i7 6950X
Graphics
2x GTX 1080
Mac
MacBook Pro, Mac Pro
Mobile Phone
iOS
Hi !

I really need help to understand what is going wrong with my setup.

During 2 years I was on macOS Sierra and everything was fine, I use this workstation to work everyday, but I had to update to High Sierra due a software update. Of course I did a fresh install for macOS High Sierra (based on the great guide from KGP). Everything was fine until I reached the step of Nvidia web drivers.

I am able to boot correctly when only one card is plugged. When I put the two cards, macOS won't boot or boot after 10 min !
Most of the time I got black screen but, I can't access through VNC. Sometimes I got desktop but system is very unstable and some informations are missing (see attached files).
I already tried different things with clover options but without success.

To resume, the same build, with 10.12 worked perfectly, now with 10.13.6 I can only boot with one card.

Anyone got an idea to start digging ?

Configuration:

- Asus Sabertooth X99 (up to date, patched MSR unlocked)
- i7 6950X
- 2X MSI GTX 1080
- 64GB DDR4
- NVME 970 (macOS drive - APFS)

Please find my EFI Folder.
 

Attachments

Joined
Nov 5, 2018
Messages
86
Motherboard
Z390 Aorus Pro
CPU
i9-9900K
Graphics
2 x Vega 64
Same. If you find a solution please share- there seem to be a few more of us looking for a fix.
 
Joined
Nov 14, 2012
Messages
110
Motherboard
ASUS Sabertooth X99 TUF
CPU
i7 6950X
Graphics
2x GTX 1080
Mac
MacBook Pro, Mac Pro
Mobile Phone
iOS
I found the solution for me.
It was into the bios. I have to disable the settings called "4G Decoding" for boot process.

Hope it will works for you.
 
Joined
Nov 5, 2018
Messages
86
Motherboard
Z390 Aorus Pro
CPU
i9-9900K
Graphics
2 x Vega 64
Unfortunately I already had that disabled. I've been taking a look at your EFI file from earlier, but no luck from that either.

Thanks for sharing.
 
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