AMD HD 7770 Recognised by Mac but won't display screen

[Simplington]

Ok so everything is working fine, got my HD Graphics installed, 2/3 monitors working, wifi card, the whole lot, even iMessage works lmao, all i need is my HD 7770 to work, its plugged in and when I go to boot with the Verde.kext it black screens and the monitor doesnt pick up a signal, the other two monitors work well and even OS X Capitan recognises the HD 7770 with the correct memory as the graphics card, it just wont display a signal any help is greatly appreciated!
HD 7770
Asrock Z77 Pro4
Intel i5 2500k
64GB SSD
8GB RAM

 

[Fl0r!an]

Can you verify that all 3 screens are working in windows? AMD GPUs are limited to 2 legacy connections, so at least one of the displays has to be connected with an active DP connector or a native DP display.

In case your setup is "physically" correct you're most likely injecting a mismatched framebuffer personality. "Dashimaki" is a perfect match for reference HD 7770's (2x mDP, 1x HDMI, 1x DVI).
Other custom HD 7770's don't have a 100% matching FB personality in OS X, so it's best to disable Inject / Ati or create a custom FB personality.

 

[Simplington]

Can you verify that all 3 screens are working in windows? AMD GPUs are limited to 2 legacy connections, so at least one of the displays has to be connected with an active DP connector or a native DP display.

In case your setup is "physically" correct you're most likely injecting a mismatched framebuffer personality. "Dashimaki" is a perfect match for reference HD 7770's (2x mDP, 1x HDMI, 1x DVI).
Other custom HD 7770's don't have a 100% matching FB personality in OS X, so it's best to disable Inject / Ati or create a custom FB personality.

Yes all screens worked in windows i had two screens running off the HD7770 and one of the iGPU.
In OSX I'm trying to connect one to the HD7770 and two to the iGPU, the graphics card doesn't display anything. How do i inject these frame buffer personalities? Im a complete rookie at this stuff.

 

[Simplington]

Can you verify that all 3 screens are working in windows? AMD GPUs are limited to 2 legacy connections, so at least one of the displays has to be connected with an active DP connector or a native DP display.

In case your setup is "physically" correct you're most likely injecting a mismatched framebuffer personality. "Dashimaki" is a perfect match for reference HD 7770's (2x mDP, 1x HDMI, 1x DVI).
Other custom HD 7770's don't have a 100% matching FB personality in OS X, so it's best to disable Inject / Ati or create a custom FB personality.

You are the man! I've spent ages trying to get this to work and it just did! All i had to do was change the port number in Clover from 5 to 4 and the FB from Fushikami or something to Dashimaki! works perfect now with all monitors working! Two on the 7770 and one on the iGPU! The kexts I'm using is the Verde.kext and the AMD7000Controller.kext, I owe you a beer man!

 

[Fl0r!an]

Cool, glad it worked!

You should be able to run up to 4 concurrent displays on your HD 7770 as long es the mentioned "Eyefinity criterion" is fulfilled (regarding DP devices).

 

[Simplington]

Cool, glad it worked!

You should be able to run up to 4 concurrent displays on your HD 7770 as long es the mentioned "Eyefinity criterion" is fulfilled (regarding DP devices).

In terms of saving the edits i made in the GPU injection menu on Clover, how can I go about doing that? Also one last issue is that my iGPU is very glitchy, pixelisation occurs and it looks like this, only on the iGPU monitor however.

 

[Fl0r!an]

I'm no expert on iGPUs, so I'm not sure about this. As I said, I'd attach all displays to the AMD graphics card.

You can apply those edits permanently to your config.plist (found in /EFI/Clover on your EFI partition).

 

[Simplington]

I'm no expert on iGPUs, so I'm not sure about this. As I said, I'd attach all displays to the AMD graphics card.

You can apply those edits permanently to your config.plist (found in /EFI/Clover on your EFI partition).

How do I edit the config.plist once i locate it? The settings i changed were in the graphics injection menu and i don't know how to edit that bit in clover configurator.

 

[Fl0r!an]

It should have the same name in Clover Configurator (-> FBName).