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[Help] X79 - Fully working other than RX580

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Hi guys,

Just installed Mojave and I have a fully working build with the exception of my GPU. Even iMessage is good.

My GPU is fine with a single display, however if I add multiple, I loose acceleration and the secondary display just flickers. Also, the only ports that work are the 2 display ports. I am trying to run 4 displays (2 HDMI, 1 DVI, 1 Display port). I have a Sapphire nitro+ 8GB RX580

Other specs

MSI X79A-GD65 (8d)

i7 3970x

32GB Corsair Vengeance

Corsair RM650 PSU

Corsair H100i

2x Intel Datacenter 120GB SSD

1x Samsung 860 Evo SSD

1x Seagate 4TB SSHD

Any advice here? Will post a full guide/pics in working hacks when this is sorted :)

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Thanks man, ill try it now. Yeah my bios has Legacy & UEFI enabled, currently booting efi

Added in 7 minutes 51 seconds:


Alrighty so I tried booting with that and I didn't boot at all, it got stuck on

"FireWire (OHCI)" etc (pic attached)


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[ref]MaLd0n[/ref], Yup thats what im running, still only able to use 1 display

Added in 4 minutes 20 seconds:


Spent another few hours trying various patches and still no luck.

Do you think it would be worth trying either 10.13 or 10.15?

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