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<blockquote data-quote="lclev" data-source="post: 1762917" data-attributes="member: 307555">Has the&nbsp; AMD Radeon HD 7970 had it's firmware flashed to support EFI or is it a straight PC card?&nbsp;&nbsp; The reason I ask is because I have a 2010 Mac Pro that I had a GTX 780 PC card in.&nbsp; I had all sorts of weird little issues that while not insurmountable, were annoying.&nbsp; I recently upgraded to a GTX 1080 that has had it's firmware flashed giving me EFI and the grey boot screen.&nbsp; A happy side effect is all the little weird issues are gone.&nbsp;&nbsp; Biggest issues?&nbsp; With the 780 in it would sometimes not go to sleep.&nbsp; And sometimes sleep worked great but when I woke it to do video work, the video would jerk until I restarted the computer.&nbsp; Obviously no boot screen, but I have a GT 120 card and I could switch to it to see it.&nbsp; While using the GT120, I still could not hold down the option key to select another boot drive or boot into recovery or disk first aid.&nbsp; Those were the most annoying but you get the idea.A card with a flashed card that now has EFI had eliminated the need for the GT120 and I have no boot issues.&nbsp; Also the wake from sleep causing jerky video problem is gone.&nbsp; Lisa</blockquote>

[QUOTE="lclev, post: 1762917, member: 307555"] Has the AMD Radeon HD 7970 had it's firmware flashed to support EFI or is it a straight PC card? The reason I ask is because I have a 2010 Mac Pro that I had a GTX 780 PC card in. I had all sorts of weird little issues that while not insurmountable, were annoying. I recently upgraded to a GTX 1080 that has had it's firmware flashed giving me EFI and the grey boot screen. A happy side effect is all the little weird issues are gone. Biggest issues? With the 780 in it would sometimes not go to sleep. And sometimes sleep worked great but when I woke it to do video work, the video would jerk until I restarted the computer. Obviously no boot screen, but I have a GT 120 card and I could switch to it to see it. While using the GT120, I still could not hold down the option key to select another boot drive or boot into recovery or disk first aid. Those were the most annoying but you get the idea. A card with a flashed card that now has EFI had eliminated the need for the GT120 and I have no boot issues. Also the wake from sleep causing jerky video problem is gone. Lisa [/QUOTE]

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