AS REQUEST OF EXPÉRIENCED MEMBER, I'D LIKE TO MENTION AT THE BEGINNING, THIS TOPIC IS BASED ON MY OWN TEST, I BOUGHT THESE CARDS, MAKE EFI ROM DIRECTLY ON NETKAS SCRIPT, WITHOUT ANY OTHER MODIFICATIONS, AND FALSHED BACK THEN TESTED ON MAC PRO 5.1, 3.1, SO THIS IS AND ONLY IS A PERSONNAL ADVICE TO WHOM WANTS TO BUY A PC Card TO FLASH THEMSELVES TO HAVING BOOT SCREEN, EVEN FURTHER TO KNOW WHICH CARD SUPPORT 4K OR HOW MANY MINITORS YOU CAN CONNECT AFTER FALSHED MAC EFI, IF YOU HAVE OTHER CARDS OR THE SAME CARDS HAVE DIFFERENT BEHAVIOR, PLEASE POST IT HERE IF YOU LIKE, SO WE CAN KEEP THE LIST USEFUL, IF YOU HAVE OTHER MOTHOD TO MAKE MAC ROM, YOU ARE SO WELCOME TO DISCUSS. AT THE END WE ARE ALL HERE BECAUSE WE LOVE MAC AND HAVE ENTHUSIASM THE SAME, I LOVE THIS FORUM, AND I WANT TO DO SOMETHING FOR IT, I WONT DEVISE PEOPLE, I WONT JUGE OTHERS, NO MATTER HE OR SHE HAS KNOWLEDGE OR NOT!
As request of work, i tested a lot of amd cards for mac efi, specially flashed by netkas script, i've found there are people like me who wants to know the effets after flashed before do it, or for certain usage for example reinstallation of mac os, switch between the systems from start up, this is still very useful for a great part of musicians, since their music equipement and software supported better in old mas os, so i write down some expériences here to share with members, i'd like to say thank you for members like alex, mike, coco, h9826, etc, their helps make me learn quick, i thank to you all so much.
There cards were tested on mac pro 5.1, then 3.1 non pirated system:
ASUS:
Asus 280/280x works on only one dvi (up position) , no matter you flash it to 280x or 7950/7970, (yes you can flash 280 to 7950, and flash 280X to 7970), it won't change anything on result, only one dvi worked, no other connector will be activated on mac, so don't buy it absolutely, this is confirmed at least by two members
Asus 7950/7970 will work on dvi + 2x mini dp, hdmi doesn't work, good to connect 2 cinema display
Asus 7970 the 6 ports version: 2x dvi + 4x displayport, only one dvi and one displayport work on mac after flashed
2 monitors at same time, no matter on mac efi or pc uefi, you can just use two monitors under mac osx
SAPPHIRE:
Sapphire 280/280X/7950/7970 has toooooo many differents cards, I mean you can tell from only the card's outlook, they are so different one to another, but they may be devised by two types: the version has 3 silver plastique between two fans, this is the first type, and all others version cards: dual x, trip x, vapor, vapor x, etc. are the second type
The silver plastique version works with three ports: dvi+hdmi+dp which one the same line, the others will work only on one dvi and one displayport, like asus the hdmi will not work on mac, neither under mac os nor windows, but you have second rom works perfectly without boot screen like other amd cards, both types can only connect with 2 monitors at the same time.
two monitors at same time
GIGABYTE:
gigabyte 280/7950 works on dvi + 2x mini dp, hdmi will not work
gigabyte 280X/7970 works on all four video ports perfectly including hdmi 4k
2 monitors at same time
MSI:
msi 7950/7970 will work like gigabyte 280, dvi+ 2x mini dp, the hdmi will not work
msi 280/280X works perfectly like gigabyte 280x, four video ports activated on mac
2 monitors at same time
CLUB 3D:
all serie 280/280x 7950/7970 worked perfectly with script, boot screen on all 4 video ports, but still can only connect 2 minitors, with any combination you want, of course you will have 4K support on hdmi
XFX:
Personnal tested again another XFX 280x black color dual fans version, DVI + hdmi + 2x mini displayport, doesn't work at all, boot from apple logo and end wiht white screen with four languages warning.
some member said his xfx 7970 works on all 5 ports: 2x dvi, hdmi, 2x mini dp, i haven't had a chance to teste it myself, thank you for crjackson2134 message.
AGAIN: THESE CARDS ARE NOT THE SAME SERIAL, EVEN THEY ARE THE SAME MODEL AND SAME FACTORY OR SUBVENDORS, IF IT SHOWS SOME OF THESE WORK AND SOME OTHERS NOT, IT SHOULD BE CONSIDER AS A RISQUE TO BUY A DOESN'T WORK ONE, SO MY CONSEIL IS DON'T BUY THE CARDS OF THESE LABLES, JUST MAKE SURE DONT WASTE ANY TIME TO THINK WHY WHEN IT DOESN'T WORK WITH.
The ideal to make this is not to say which card is good or bad, but in general information, if someone said his card works not like others, it's means this card behavior is not stable, that's why people has different experience on it, so when someone wants to buy it, he will know what is waiting for him, that makes sens right? by normal human consideration: we will avoid to buy some confused thing, and to buy something for sure, which people has commun experience, that we called worth to buy, or rentable in french. nobody buy thing for looking for trouble, anyway.
So basically, except i mentioned above msi, gigabyte and club 3d, now we have xfx 7970, like perfectly worked with netkas script, if anyone find new or find mistake here please you are welcome to give a feedback, thank you all, and have fun.
As request of work, i tested a lot of amd cards for mac efi, specially flashed by netkas script, i've found there are people like me who wants to know the effets after flashed before do it, or for certain usage for example reinstallation of mac os, switch between the systems from start up, this is still very useful for a great part of musicians, since their music equipement and software supported better in old mas os, so i write down some expériences here to share with members, i'd like to say thank you for members like alex, mike, coco, h9826, etc, their helps make me learn quick, i thank to you all so much.
There cards were tested on mac pro 5.1, then 3.1 non pirated system:
ASUS:
Asus 280/280x works on only one dvi (up position) , no matter you flash it to 280x or 7950/7970, (yes you can flash 280 to 7950, and flash 280X to 7970), it won't change anything on result, only one dvi worked, no other connector will be activated on mac, so don't buy it absolutely, this is confirmed at least by two members
Asus 7950/7970 will work on dvi + 2x mini dp, hdmi doesn't work, good to connect 2 cinema display
Asus 7970 the 6 ports version: 2x dvi + 4x displayport, only one dvi and one displayport work on mac after flashed
2 monitors at same time, no matter on mac efi or pc uefi, you can just use two monitors under mac osx
SAPPHIRE:
Sapphire 280/280X/7950/7970 has toooooo many differents cards, I mean you can tell from only the card's outlook, they are so different one to another, but they may be devised by two types: the version has 3 silver plastique between two fans, this is the first type, and all others version cards: dual x, trip x, vapor, vapor x, etc. are the second type
The silver plastique version works with three ports: dvi+hdmi+dp which one the same line, the others will work only on one dvi and one displayport, like asus the hdmi will not work on mac, neither under mac os nor windows, but you have second rom works perfectly without boot screen like other amd cards, both types can only connect with 2 monitors at the same time.
two monitors at same time
GIGABYTE:
gigabyte 280/7950 works on dvi + 2x mini dp, hdmi will not work
gigabyte 280X/7970 works on all four video ports perfectly including hdmi 4k
2 monitors at same time
MSI:
msi 7950/7970 will work like gigabyte 280, dvi+ 2x mini dp, the hdmi will not work
msi 280/280X works perfectly like gigabyte 280x, four video ports activated on mac
2 monitors at same time
CLUB 3D:
all serie 280/280x 7950/7970 worked perfectly with script, boot screen on all 4 video ports, but still can only connect 2 minitors, with any combination you want, of course you will have 4K support on hdmi
XFX:
Personnal tested again another XFX 280x black color dual fans version, DVI + hdmi + 2x mini displayport, doesn't work at all, boot from apple logo and end wiht white screen with four languages warning.
some member said his xfx 7970 works on all 5 ports: 2x dvi, hdmi, 2x mini dp, i haven't had a chance to teste it myself, thank you for crjackson2134 message.
AGAIN: THESE CARDS ARE NOT THE SAME SERIAL, EVEN THEY ARE THE SAME MODEL AND SAME FACTORY OR SUBVENDORS, IF IT SHOWS SOME OF THESE WORK AND SOME OTHERS NOT, IT SHOULD BE CONSIDER AS A RISQUE TO BUY A DOESN'T WORK ONE, SO MY CONSEIL IS DON'T BUY THE CARDS OF THESE LABLES, JUST MAKE SURE DONT WASTE ANY TIME TO THINK WHY WHEN IT DOESN'T WORK WITH.
The ideal to make this is not to say which card is good or bad, but in general information, if someone said his card works not like others, it's means this card behavior is not stable, that's why people has different experience on it, so when someone wants to buy it, he will know what is waiting for him, that makes sens right? by normal human consideration: we will avoid to buy some confused thing, and to buy something for sure, which people has commun experience, that we called worth to buy, or rentable in french. nobody buy thing for looking for trouble, anyway.
So basically, except i mentioned above msi, gigabyte and club 3d, now we have xfx 7970, like perfectly worked with netkas script, if anyone find new or find mistake here please you are welcome to give a feedback, thank you all, and have fun.
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