Unsuccessful with XFX ZWFL 4870 HD 1 Go
Hi,
My 8800GT died a few weeks ago so I wanted to try to flash an ATI 4870 for my Mac Pro (3,1).
I first flashed with WinFlash --to make a long story short, I wasn't able to boot on a DOS CD at the time and I've read successful flashing stories using WinFlash. Unfortunately, WinFlash crashed during the process and, for a while, I thought my brand new card was bricked. No video signal under Windows nor Mac OS X.
After a day or two, I finally found a way to boot on a DOS CD so I flashed the card back with its original firmware --previously saved with GPU-Z-- with ATIFlash DOS. I rebooted on Windows and was delighted to see that the card was working again. I tried a few 3D intensive games (such as GTA 4 and The Saboteur) to make sure everything was okay.
Now that I was able to use ATIFlash DOS, I decided to flash the card using the jacobcroft tutorial and ROM links. After the process ended I rebooted and the grey screen with the Apple logo appeared; hurray! After a while, the screen turned blue --normal-- then the Snow Leopard background showed up... completely scrambled with the spinning ball! I let the Mac finish booting then I tried to connect to it from another Mac on my local network, using Screen Sharing; the connection was okay but the windows (remote screen) remained black. I could browse all volumes and folders thru file sharing and I could also connect to the Mac via a SSH session, so the system seemed to be running normally, with just no screen.
I rebooted on Windows but immediately, the infamous red blinking "You have not connected one of your video card power connectors..." message appeared. Same thing when trying to boot on the DOS CD.
To reflash the card with its original firmware again, I had to connect my old 8800 GT. The card "dies" during booting in normal mode whether on Mac OS X or Windows but it "works" when booting on Windows in Safe Mode or DOS --although in DOS, the screen is filled with weird characters but we can see enough to navigate thru menus and launch the flashing process. It doesn't boot in Mac OS X Safe Mode --it'd be no use, anyway.
I tried several times to flash back with the original firmware then with the modified Mac one but each time, the exact same problems occur.
Then I found this thread so I wanted to give it a try. I disconnected the screen cable --the only way the Mac Pro boots "normally" under OS X so I can control it thru Screen Sharing. I checked with System Profiler that the 4870 was there --it was-- then I launched ATI Flashing Tool and followed the instructions, using the "Mac modified" ROM found in the "4870/ZWFL..." folder extracted from ROMs.zip. No change, the display remained scrambled --red blinking message still appears when booting on Windows.
I even tried flashing with ATIFlash DOS with the "Mac modified" ROM from that ROMs.zip file. Same thing.
So, here I am. I have a brand new ATI 4870 HD card (XFX ZWFL 1 Go) perfectly working with Windows but I can't get it to work with Mac OS X. I suppose I need to find a good ROM but since I used the one supposed to work with my exact card, I don't know what to do. If someone has an idea, I'll take it =)
My Mac Pro (3,1) 8 Go is running Snow Leopard 10.6.2. The card is an XFX ZWFL 1 Go powered with two (tested) PCI-e cables. Same result on both DVI connectors.
Regards,
Ch.