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Mac Pro + MSI R5770 HAWK= No Output

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Last response: in Graphics & Displays
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Hello,

I just purchased a MSI R5770 HAWK to replace by Nvidia 8800 GT for my 2008 Mac Pro .

I purchased a new card because the 8800 gt stopped functioning well after 2 years--every time I booted I would get to the boot screen and there would be artifacting and screen tears all over the place, and I wouldn't be able to advance past that screen.

I just received the 5770 several hours ago and after installing it, I cannot even get as far as the boot screen. The monitor has no input, as if it were not connected to anything. There is not even a black screen, just no video output whatsoever.

There is no beeping, I don't hear the card's fan, I've tried 3 different expansion ports and made sure it was seated deeply. I've power cycled close to a dozen times now. When I put the old card back in, at least I get to the fubar screen, but with this new card, I can't even get that far.

The power supply should be sufficient, and I made sure that the card was plugged in using the 6-pin connector, which was the only one that appeared to needed to be plugged.

What should I do? I ordered from NewEgg, is the card just DOA?

Edit: It's also worth noting that I am dualbooting OSX/W7

More about : mac pro msi r5770 hawk output

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Graphics card Master

have you even thought that there may be another issue. your mac doesnt work with 2 gfx cards. Maybe return it and try a gts450...... it might just be a compatability thing.

iam2thecrowe said:
have you even thought that there may be another issue. your mac doesnt work with 2 gfx cards. Maybe return it and try a gts450...... it might just be a compatability thing.


I only have one card in there.
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Graphics card Master

no ***, but it doesnt work with 2 SEPARATE graphics cards. it doesnt work with the 8800 and it doesnt work with a 5770. Maybe your motherboard is fried, maybe your PSU is no good, maybe you got a dud 5770, maybe its just not compatable. I would vote for the 5770 not compatable and would suggest you should swap it for a gts450. You have a mac, macs arent really meant to be upgraded, apple arent friendly in this way. When people are done with them they get a new one and talk about how pretty it is and how it can run one particular program that windows cant run (yet they forget windows can run a million that mac cant run) /rant
Graphics card Master

I thought Mac's required even the graphics card to have a special bios for Mac products. You may have to purchase your video card from Apple for it to run on your Mac.
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