How to check: 1. Dump the rom using sysfs. 2. Download and compile rom parser from aw's blog. 3. Execute it on the rom. If there is a second image, it is most likely an efi driver. About radeons: Some of these cards have broken efi drivers, some not. If there is no out-of-the-box driver and there's no vendor update you can take the efi driver from hd6450's rom(google insanelymac forums) and combine it with yours using efirom from edk2 tools. Afair r7 270 is a rebranded card, so it is basically an hd7xxx series card. I have an HD7750 for which i've crafted the rom using the method described above. <div class="gmail_quote">On Nov 13, 2015 10:28 AM, "Nick Sukharev" <<a href="mailto:nicksukharev@gmail.com">nicksukharev@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I wonder how do I check whether my card supports UEFI. I have a small set of R7 and R9 radeons (not your version though) that I am able to pass as a second adapter while having emulated graphics as main. I.E. for ASUS R7240-2GD3-L I cannot find any info on UEFI bios except some comments in reviews saying it is not available. MSI Radeon R9 270 could theoretically have it but it requires a jumper setting and I am pretty sure I haven't changed it. The third card is Diamond R9270XD52GXOCV2 and I can't find anything about its UEFI bios either. Either I got lucky with 3 randomly selected radeons or you should be able to do the same - use emulated graphics to boot and setup.</div><div class="gmail_extra"> <div class="gmail_quote">On Mon, Nov 2, 2015 at 1:49 PM, Tim Terhorst <<a href="mailto:mynamewastaken@gmail.com" target="_blank">mynamewastaken@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi folks, After spending a few days reading through the vfio blog, various guides, and the google doc listing compatibility, I decided to give it a try. My hardware: Mobo: Asus H97M Anniversary Cpu: Intel i5-4440 Discrete gfx: Hawaii PRO [Radeon R9 290] MSI Onboard Intel gfx lspci output: <a href="http://pastebin.com/emzyeVNW" target="_blank">http://pastebin.com/emzyeVNW</a> _______________________________________________ vfio-users mailing list <a href="mailto:vfio-users@redhat.com" target="_blank">vfio-users@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> </blockquote></div> </div> _______________________________________________ vfio-users mailing list <a href="mailto:vfio-users@redhat.com">vfio-users@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> </blockquote></div>