-tool- Posted August 15, 2015 Share Posted August 15, 2015 (edited) 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 ... 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 August 28, 2015 by -tool- Inappropriate image. 2 Link to comment Share on other sites More sharing options...
waqy Posted August 25, 2015 Share Posted August 25, 2015 I've got a GIGABYTE HD 7970 3gb card. Will flashing this bios affect anything in terms of performace? What does it change? Thanks Link to comment Share on other sites More sharing options...
-tool- Posted August 28, 2015 Author Share Posted August 28, 2015 This is the ASUS GPU 7970 reference edition card: I flashed the bios from AMD 7970 Ghz Edition, both reference cards: Link to comment Share on other sites More sharing options...
waqy Posted August 29, 2015 Share Posted August 29, 2015 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: Is there any point me flashing the BIOS? Can you provide the file and instructions please? Many thanks! Link to comment Share on other sites More sharing options...
TheRacerMaster Posted August 30, 2015 Share Posted August 30, 2015 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). Link to comment Share on other sites More sharing options...
-tool- Posted October 9, 2015 Author Share Posted October 9, 2015 I just tried a Gigabyte R9 280x Windforce edition: All 4 ports working and HDMI working as it should! Link to comment Share on other sites More sharing options...
keksonja Posted March 8, 2016 Share Posted March 8, 2016 Will this inject method work with latest osx 10.11.3? I have saphire 7970 flashed to 1 ghz edition bios Link to comment Share on other sites More sharing options...
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