Alexco Posted December 21, 2014 Share Posted December 21, 2014 Hi all, I recently bought a XFX Radeon 280x DD Black Edition with UEFI Bios. Windows 8 runs fine but the card is not recognized by OS X. I used Ozmosis Bios and selected the option to inject ATI (and Intel for IGFX). Just before the login screen is shown the PC reboots. (without an error log, as far as I can see) I then tried Clover Bootloader and used the original Gigabyte Bios, again configured to inject ATI and Intel, but the result is the same. Using Google I found that I needed to reflash the Radeon card with a different Bios. I did so by using a somewhat older Bios (non UEFI) and I can reach the OS X desktop without issues. Card is correctly identified using Futomaki FB. But the card crashes instantly (at least the graphics driver) if I start a 3D application (Benchmark, etc.). Sadly this happens also with Windows 8. So the question is, what do I need to do to get the card running with the original Bios? Can I use the LoadVBios option in Clover to test different patched versions (and have the original flashed in the card)? Thanks! System: OS X 10.10.1 and Win 8.1 GA z97-UD7-TH with Intel 4970k and 16GB RAM XFX Radeon 280x DD Black Edition 3GB Ozmosis Bios or Clover Link to comment https://www.insanelymac.com/forum/topic/303488-problem-with-xfx-radeon-r9-280x-dd-and-uefi-bios/ Share on other sites More sharing options...
kvonlinee Posted December 21, 2014 Share Posted December 21, 2014 That mean the graphics card defect, try to flash the card with a similar bios or exchange for a different one. I have one Radeon 7950 act the same like that, techpowerup had the bios video card, relfash and it work. Good luck. Link to comment https://www.insanelymac.com/forum/topic/303488-problem-with-xfx-radeon-r9-280x-dd-and-uefi-bios/#findComment-2096707 Share on other sites More sharing options...
Rampage Dev Posted December 21, 2014 Share Posted December 21, 2014 The UEFI BIOS on all XFX cards for the AMD 200 series are broken for Mac OS X. Do not flash the card as there is no reason to ever do this and it will break the card under windows making the card useless. Use the Boot Loader to load a modified BIOS to make the GPU work properly under Mac OS X. Use a Asus 280X BIOS to do so. 1 Link to comment https://www.insanelymac.com/forum/topic/303488-problem-with-xfx-radeon-r9-280x-dd-and-uefi-bios/#findComment-2096726 Share on other sites More sharing options...
Alexco Posted December 24, 2014 Author Share Posted December 24, 2014 Thanks, using Clover to load a BIOS works like a charm, but I used an older XFX non UEFI one for this. The box was running 3D benchmarks the entire night, no issues. (I think it does not matter if I use an Asus or this BIOS). Now I can safely ditch Ozmosis and concentrate on Audio and sleep... Link to comment https://www.insanelymac.com/forum/topic/303488-problem-with-xfx-radeon-r9-280x-dd-and-uefi-bios/#findComment-2097592 Share on other sites More sharing options...
abds69 Posted January 10, 2015 Share Posted January 10, 2015 Hello , thanks guy for answering because i have the same issue with a Sapphire 280X dualX. My bootloader is chameleon 2.3 , @alexco which switch did you use in the bootloader and where did you download your bios image ? thanks guys. Link to comment https://www.insanelymac.com/forum/topic/303488-problem-with-xfx-radeon-r9-280x-dd-and-uefi-bios/#findComment-2102037 Share on other sites More sharing options...
Alexco Posted January 10, 2015 Author Share Posted January 10, 2015 Hi, BIOS can be found here http://www.techpowerup.com/vgabios/, just select the proper card and test older versions first. Use a tool like GPU-Z (Windows) to determine the BIOS version flashed to your card. For Clover boot loader use <key>LoadVBios</key> <true/> and put the BIOS file to the folder EFI/CLOVER/ROM on your EFI partition. Rename it to [vendorID]_[deviceID].rom (use hex values). For chameleon I don´t know, sorry. 1 Link to comment https://www.insanelymac.com/forum/topic/303488-problem-with-xfx-radeon-r9-280x-dd-and-uefi-bios/#findComment-2102165 Share on other sites More sharing options...
abds69 Posted January 11, 2015 Share Posted January 11, 2015 thanks guy, finally not necessary, it was an insufficient power supply . bought a 750W certified, everything fine !! Thanks . 2 Link to comment https://www.insanelymac.com/forum/topic/303488-problem-with-xfx-radeon-r9-280x-dd-and-uefi-bios/#findComment-2102204 Share on other sites More sharing options...
Alexco Posted January 14, 2015 Author Share Posted January 14, 2015 Fine that it is working now. I just encountered a problem with my setup. Wake up from sleep seem to work fine but if I start a 3D application I get graphic distortions and after a while the graphic driver crashes. Only solution is to reboot the box. Has someone an idea? Link to comment https://www.insanelymac.com/forum/topic/303488-problem-with-xfx-radeon-r9-280x-dd-and-uefi-bios/#findComment-2102851 Share on other sites More sharing options...
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