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Graphic card upgrade for MacPro 1.1

I want to upgrade the graphics card on my MacPro Model 1.1. It came with a Nividia GForce 7300GT. I thought theATI Radeon 5770 would work but I can only get that to display one monitor. Is there another card that will work with this Mac's architecture?

Mac Pro, Mac OS X (10.6.7)

Posted on May 15, 2012 1:09 PM

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20 replies

May 15, 2012 1:51 PM in response to The hatter

I can't go to 10.6.8 yet due to a QuickTime issue with my video editing software. I will go to Lion soon.

It was the MDP ports that would not send the signal. The DVI works fine.


My Mac is precedes the 2009 models. I purchased it new in Oct 2007

(Apple Mac Pro MA356LL/A Desktop PC (Two 2.66 GHz Dual-Core Intel

Xeon Processors, 1 GB RAM, 250 GB Hard Drive, SuperDrive)


So are you sure the Radeon will work with that model?


Message was edited by: bagerr

May 15, 2012 2:01 PM in response to bagerr

It is still a 1,1 (or even 2,1) even if you didn't purchase it until just before the 2008 (which would have been a lot sweeter deal with EFI64 and support for 64-bit kernel).


Hopefully you have 8GB RAM and new hard drives by now. Some even upgrade the processor set to 5355 or 45 to have 8 cores.


You only get all the security updates and such if you have 10.6.8.

Dual boot and try - but you need a minimum 10.6.5 drivers for the 5770.


I think it a PITA that the user hardware profile sig is not on every post - removed because any search turned up... profiles instead of thread content.


MDP to HDMI http://support.apple.com/kb/HT4241


Active adapters cost but work, though req'd for dual-link DVI displays don't think yours is one of those.

May 15, 2012 10:28 PM in response to bagerr

Many of us have this card running with no issues, search this forum.

I have a sept 2006 MacPro 1.1 with this card and run three monitors. An Apple 30" cinema display using dual DVI and the two MDP's output VGA to two legacy 15" monitors. Get from Monoprice a MDP to VGA connector. Per Apple, (again search is your friend) when the DVI port is used, the MDP's will ONLY output VGA. I tried all the other cables and adapters until I stumbled onto this fact.

May 24, 2012 6:13 AM in response to bagerr

Finally found the answer. On my machine, which is a 2006-20007 model, only the DVI port is supported with the Radeon 5770:


2006-2007 Mac Pro:

  • Sorry to say it, but the 5870 is not…repeat…NOT compatible.
  • The 5770 is compatible, but only with the DVI connection.

2008 Mac Pro:

  • Both the 5870 and 5770 cards work with both the DVI and MiniDisplay Port connections in any combination of two displays. So, you can have two displays with MiniDisplay connections, or one with a DVI connection and one with a MiniDisplay connection.
  • Adding a third display will override the DVI connection, causing it to deactivate.

2009-2010 Mac Pro:

  • Both the 5870 and 5770 cards work with both the DVI and MiniDisplay Port connections in any combination of two displays. So, you can have two displays with MiniDisplay connections, or one with a DVI connection and one with a MiniDisplay connection.
  • Adding a third display will override the DVI connection, causing it to deactivate.


Original article here:

http://blog.macsales.com/6856-owc-reveals-which-radeon-video-cards-work-with-200 6-2009-mac-pros

May 24, 2012 6:32 AM in response to MacFire

Not sure what I can add to this discussion other than either more confirmation or confusion, but I just upgraded my (2007) Mac Pro 2,1 8x3.0ghz to a Radeon 5770 after the original Radeon X1900 XT started losing one monitor on a regular basis.


I am running the latest update of Lion. I have 2x ACD 23", last aluminum models.


I am running one ACD from the DVI port, and the second from one of the MDP using a passive MDP to DVI adapter. Based on all the forums that I had read, this was what I was expecting and even though not officially supported, has been working flawlessly for me.


Re the version of OS X required, I believe it is tied to when Apple delivered the necessary drivers to support these cards.

May 24, 2012 9:32 PM in response to bagerr

Yes. On at least the 2006 if using the DVI dual link port, the MDP will not have the power for DVI, hence the black screens, I also found buried, confusing Apple support articles on this. I bought and tried passive MDP to DVI, no go. I tried an expensive Dual link powered adapter, no go. Apple said use MDP to VGA, since my DVI port was in dual mode to feed the 30" Cinema Display. My 2nd and 3rd monitors had VGA. So I bought from Monoprice two MDP to VGA cables and vola, three monitors running!

Graphic card upgrade for MacPro 1.1

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