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AMD 7970 with 4 displays working


-tool-
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I spent all day trying to get my 3 displays up and running with an ASUS 7970 reference card, my old  Sapphire 5850 xtreme worked just fine all this years (DP+HDMI+DVI)

 

With clover bootloader, I tried all Personalities with and without ati inject. Max 2 displays working, the third one had black screen.

 

Swapped the GPU for a Sapphire AMD 280x Dual-X without inject got 3 displays working perfectly.. With inject just 2.

 

 

Got back to business with the asus, I almost gave up until I started thinking of flashing D700 bios on the card.... The 7970 and D700 are the same GPU, the 280x is the same tahiti gpu too.

 

BIOS SOLUTION!

The 7970 has a BIOS SWITCH, so you can have 2 independent BIOS!

I Flashed the AMD 7970 GHz edition bios from this post:

http://www.overclock.net/t/1281425/amd-release-hd-7970-ghz-bios-upgrade-for-reference-hd-7970

 

Because is from different vendor (ASUS --> AMD) you have to do it by force.

atiwinflash -f -p 0 bios_ghz_edition.bin

Then reboot to OSX and BOOM! without touching anything all 3 Displays working.

 

BONUS... plugged HDMI cable  in and ...

gnjEqdh.png

Hotplug worked too! What a difference on this card...

 

 

 

 

HDMI: Apple just need to fix the "TV mode" on HDMI displays, I just can't use my display with HDMI because is recognised as TV, with Ycbcr not RGB and so on, This happens to my Macbook Air  with miniDP-HDMI adapter, plugin in a HDMI-DVI converter on the end works perfect.

 

Why on my 5850 HDMI worked perfectly? 

Edited by -tool-
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Thanks..

 

I boot using the following settings in Clover:

 

Inject ATI Yes

Frambuffer: Aji

Ports: 05 (don't know why)

Load VBIOS: Yes

 

I get the following settings in About Mac:

Boa0gQq.png

 

Is there any point me flashing the BIOS?

 

Can you provide the file and instructions please?

 

Many thanks!

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If all of your ports are working, you don't have to flash anything. If your card has a reference port layout, it should work fine with your injection. Also, the reason you see 05 ports is because 1 of them is a DAC (the DVI port can use a DVI>VGA adapter, so it's technically 2 ports on a single physical port; I don't know if the DAC works in OS X, I haven't tried).

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