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 21 
 on: March 10, 2017, 12:18:12 AM 
Started by jeanlain - Last post by vinnie1978
pc cards come in many variations, and differ in ports to the Mac versions.
Therefore, it it is possible that after flashing the card to Mac.efi  not every port will give signal.

You have the biggest chance of success, with a reference model of a videocard.
The link to the page could be helpful, the efi part that will be added to the vbios part.

The efipart for every 5850 is therefore the same, that's why it is so important, that you post the original rom of your videocard.
This way you get a completely custom rom, for your videocard.

 22 
 on: March 09, 2017, 07:14:52 PM 
Started by jeanlain - Last post by leo1984
There is a topic from 2013 http://forum.netkas.org/index.php?topic=597.0 , in which Blacksheep made the custom roms for these cards.

It doesn't seem the same board as mine, in my toxyc 5850 I've got 4 ports: 2 x DVI 1 x HDMI 1 x DisplayPort, while the Radeon 5850 Xtreme 1GB of the link you posted has only 1 x DisplayPort, 1 x HDMI and 1 x DVI.
I'm not absolutely an expert, do you think that will not cause any problem?
Anyway I've already posted in that topic but unfortunately I have not received any answer... Sad

 23 
 on: March 09, 2017, 05:15:44 PM 
Started by netkas - Last post by cornflakes1023
Finally got the second power cable. This one is a go. Still no go on the 5870 rom that was based on my original rom however. Thanks for the effort on both!

 24 
 on: March 09, 2017, 05:15:30 PM 
Started by jeanlain - Last post by vinnie1978
There is a topic from 2013 http://forum.netkas.org/index.php?topic=597.0 , in which Blacksheep made the custom roms for these cards.

 25 
 on: March 09, 2017, 03:52:58 PM 
Started by jeanlain - Last post by leo1984
hi guys, i have a Sapphire Toxic HD5850 1gb version, and recently i bought a mac 5,1. is there any possibility to get the screen boot with that card? now the video signal is available starting with the login screen (not before) and the card is read in the system as a ATI 5000....
anyone could help me?

 26 
 on: March 09, 2017, 02:14:12 PM 
Started by jeanlain - Last post by TheGoog
A flashed videocard will not always support all ports available on the flashed videocard.
I think it has got something to do with variations of the Pc-version with the existing mac videocard.

If you want to know more about this, i think you should look at the radeon port mapping thread.

I flashed this videocard because i had it laying around doing nothing. I have only used the DVI-port.

The .rom i used came of this forum.

Fair enough. If I can get it working with VGA, I can be happy with that. The card only cost me $25.

 27 
 on: March 09, 2017, 01:21:56 PM 
Started by jeanlain - Last post by vinnie1978
A flashed videocard will not always support all ports available on the flashed videocard.
I think it has got something to do with variations of the Pc-version with the existing mac videocard.
The 5870 has a lot ot different pc cards, i'm happy with the ports that are working.

If you want to know more about this, i think you should look at the radeon port mapping thread.

I flashed this videocard because i had it laying around doing nothing. I have only used the DVI-port.

The .rom i used came of this forum.

 28 
 on: March 09, 2017, 04:44:42 AM 
Started by jeanlain - Last post by TheGoog
We are sharing the same EFI driver version, so that's ok. Do you have second monitor available that you can test.

I see you have a cinemadisplay connected, my monitor is a Samsung VGA, connected with a DVI-VGA converter to the DVI port of the graphics card.

UPDATE

The rom i posted yesterday , was found on my mac pro. I thought it was the same as on my EAH 5870 i was using.
 Angry

This evening i backupped the rom of my Asus EAH 5870, and compared it to the earlier posted rom.
Surprise!!! They are not the same.

I will post the rom , that i am using right this moment. Thereby, it is confirmed that it's working.




Flashed this, still no boot screen on DVI. I don't have a VGA screen to test with yet, may take a few days for that. Incidentally, I don't get DP or HDMI image either after booting up into OSX. OSX will see there's a screen attached, recognise the make/model and give it's correct resolution, but no image gets passed through, just a black screen. Any clue about that?

 29 
 on: March 07, 2017, 09:37:53 PM 
Started by Lxixboss - Last post by Lxixboss
Hi all. First of all, let me tell all of you that I have very little technical "book learnin'" under my belt. I dabble; I take things apart; I read forums like this one; I can use Google and YouTube; I can cut and paste... I say all of this because many users of this site seem to be software and/or hardware engineers and these people may have to "dumb it down" so that I can understand the answers I may receive to my questions.
I have succeeded in installing an Nvidia Geforce GT 765M from a Clevo laptop into my mid-2011 27-inch Imac running the 3.1GHz Intel Core i5. In Sierra 10.12.3, the card seems to run "OOB" although I immediately mozied over to the Nvidia website in install the most recent web drivers and the CUDA drivers. Cinebench also seems to bear out that all is running well. Of course, I get no boot screen, brightness control on second monitor support (at least, these things don't seem to be working for me). Upon perusal of the data stored with the good people at everymac.com, I see that both the 755M and 775M have been used in late-2013 Imacs (maybe if I had done my homework before buying the 765M, I would have bought one of those... although these things don't come up too often at an affordable price... I bought the card "as-is" from a deceased gaming laptop for fifty bucks... CANADIAN). If these MXM cards are like their PCIe brethren, I would expect that the ROMs can be extracted from them, modified if necessary to make them compatible with the 765M (which I suspect would be a rather easy thing for the aforementioned software/hardware engineer types who are known to frequent these parts), and then re-flashed into my 765M (provided the BIOS chip is of sufficient capacity).
Having flashed over a dozen PCIe cards for use in various Mac Pros (8800GTs, HD 5770s, 5870s and, my personal favorite, a GTX 680), I have a good general idea of how to do it from MiniDos or Windows. If my Mac Pro analogy holds true, I believe the actual flashing could be done through BootCamp and flip-flopping from Sierra to Windows for the various steps.
So, has this been done? If so, where can I find the knowledge to do it? If it hasn't, is anyone looking for a challenge? I am, of course, willing to help although the previously alluded to lack of "book learnin'" may make my contributions more akin to holding the flashlight and getting the beer. Please let me know and thanks in advance.

 30 
 on: March 07, 2017, 01:04:05 PM 
Started by jeanlain - Last post by vinnie1978
We are sharing the same EFI driver version, so that's ok. Do you have second monitor available that you can test.

I see you have a cinemadisplay connected, my monitor is a Samsung VGA, connected with a DVI-VGA converter to the DVI port of the graphics card.

UPDATE

The rom i posted yesterday , was found on my mac pro. I thought it was the same as on my EAH 5870 i was using.
 Angry

This evening i backupped the rom of my Asus EAH 5870, and compared it to the earlier posted rom.
Surprise!!! They are not the same.

I will post the rom , that i am using right this moment. Thereby, it is confirmed that it's working.


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