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adamsky777

macrumors newbie
Original poster
Feb 4, 2015
2
0
Yesterday after exporting, my Mac Pro 4.1 flashed to 5.1 got frozen. I restarted by pressing the power button. It came back but then the log in screen was weird and It got frozen again. Screen never came back after booting, seems like the screens are not getting signals. Tested with a Cinema Display and another Eizo screen.
I assumed that the GPU has died, I have a Nvida 8800GT Mac edition, although I've never had a boot screen with this card. It was taken out from 3.1 if I am right.
So I bought yesterday a 5770 with PC rom. I've read that after lion it should work fine. https://www.neowin.net/forum/topic/978894-pc-ati-57705870-cards-flashed-to-work-with-mac-pro/ maybe someone can confirm it ?

So I tested with both cards:

With the Nvidia I can not control remotely, however I can reach my files through file sharing. White screen after boot, and after few seconds it disappears.
With the Radeon, I can control remotely. No signal at all.
In remote control I checked the system report and it says AMD card but no kext loaded.

I did reset the PRAM
Diag Leds:
- ovtmp CPU A & B off
- psu pwr green
-5v stby amber

-sys pg green
-efi done green
-gpu ok OFF

Same with both cards

I'm trying to get a PC to flash 5770 and see.

I also tried both PCIE ports and AUX powers.

Any suggestion?

Adam


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