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  • r winn Level 1 Level 1 (0 points)

    Unfortunately, no. Only 1 16X double slot in early 2009 release. Good news here. 5770/120 w/4 monitors has been running for a week without a crash.

  • Janine Sisk Level 1 Level 1 (125 points)

    I have two monitors attached to two GT120 cards, and have been considering getting one 5770 card to drive both based on the tentative success stories posted here.  So I want to make sure I understand what you're saying - do I need this disappointing dongle in order to have two monitors on one 5770 card?  I had thought that it handled two monitors without any extra hardware, but perhaps that was incorrect.



  • Jsh111 Level 1 Level 1 (0 points)

    Depends on your monitors.  My Dell 30" monitors require dual-dvi inputs.  For single DVI or miniport monitors you should be fine.

  • Janine Sisk Level 1 Level 1 (125 points)

    Ok, thanks.  These are Apple 24" monitors, purchased in 2009 along with the Mac Pro.  They are each single miniport so it sounds like I won't need it.

  • bigj6360 Level 1 Level 1 (15 points)

    I'm tapping out.


    I pulled a Quadro 600 out of a PC. Looking forward to KP-free living... Just no boot screen


    I've uploaded around 25 KP reports to apple referencing this thread.

  • bigj6360 Level 1 Level 1 (15 points)

    Hopefully it will work for you. It hasn't for many here.

  • Graham Miln Level 1 Level 1 (10 points)

    I replaced my two GT120 graphics cards with a single ATI 5770. The kernel panics stopped immediately.


    The switch over was straight forward. I removed both the GT120 cards and installed a single ATI 5770. The single replacement card provides two mini-display ports. I have two Apple displays connected without problems.


    You may be interested in a few photos of the switch over and of the sockets on the ATI 5770.



  • r winn Level 1 Level 1 (0 points)

    FYI, I think you can only run 2 displays on the 5770, even though it has 3 ports. And it seems to work fine with one GE120 board, which is how I'm running 4 monitors right now. Hopefully next update will fix this mess, and I can add the other 120 back, and consider 6 displays.

  • Grant Bennet-Alder Level 9 Level 9 (52,325 points)

    you can only run 2 displays on the 5770

    Not so. The scarce resource on the 5770 and 5870 is POWER to boost the levels of signals from the very low Voltages of Mini DisplayPort to the comparatively higher Voltages of just about any other interface. You can run three displays if you use ACTIVE, POWERED adapters, that have signal boosters in the adapter.


    Apple sells only the High-end Dual-Link DVI with an extra USB cord to pick up extra power, but Accell and StarTech sell AMD-certified ACTIVE single-Link DVI adapters for about US$35. The deciding issue is whether your display is Wider than 1920 (1080p) wide. The adapter must say ACTIVE in its advertising.

  • devinci Level 1 Level 1 (0 points)

    I can vouch for that.  I had to buy 2x single-link Active mini-Display-to-DVI.  My regular miniDP-to-DVI only gave me 2 displays.


    BTW, I removed the nvidia cards; drop in one Sapphire 7950.    So far, 1 week no KPs.   BUT... I've lasted 3 weeks without KPs before (but i had to be very conservation and avoid putting too much things in my second GT 120).

  • myaka Level 4 Level 4 (2,450 points)

    Thanks, Graham, for your informative post.  I've been reluctant to dispose of my two GT120s, believing Apple (or NVidia) ought to find a software fix for the kernel panic issue they create and from which I, too, suffer with distressing regularity.  I think you've convinced me that it's time to throw in the towel and move to a single card to power my two 24" Cinemas.

  • Chris Richardson1 Level 1 Level 1 (5 points)

    I've been having this issue daily with my dual-GT120 Early 2009 Mac Pro.


    I'm somewhat disappointed that the solution is for me to spend £203 on a new graphics card rather than for Apple to fix their buggy drivers.  Nonetheless, thanks to eveyone in this thread who has nailed the issue down.

  • Grant Bennet-Alder Level 9 Level 9 (52,325 points)



    If you are running only two DVI displays, ONE GT120 card is more than capable of handling that task. For DVI displays, you would need some simple adapters.


    The instability seems to come from running Multiple GT120s, not multiple displays.


    There is no cheap solution for running two Mini DisplayPort displays -- that card is just too old for two modern interfaces.

  • macbitz Level 1 Level 1 (10 points)

    It's not specifically multiple GT120's because I have one GT120 and one 8800GT and have the problem.


    Now that OS X Mavericks is in the wings there must be ZERO chance of this issue being fixed (not that I was holding out much hope before), so I'll be wiping my Mac Pro and re-installing ML 10.8.2 with the supplemental update. I use my Mac Pro to earn a living and having a machine that KP's up to three times a day is untenable. Also, rather than throw good money at a 5yr old system, I'd sooner put it towards something in the future, although probably not the new 'tubular' Mac Pro as that looks insanely expensive!

  • The hatter Level 9 Level 9 (60,575 points)

    So would it be trouble to try with just one? both of those cards are 4 and 6 yrs old (the 8800GT came out 2007 really), or 'invest' in a poor little 5770 - even a PC card if it turns out the GT120 by itself works. Maybe the 8800 has reached the point it needs to be baked, or replaced, but try with just one to rule out which.


    And start with a fresh OS, clone it! so you have a good image to restore and try with that is 'unharmed' by crashes and the rest (and yes a panic taking down the system you may think it will self-correct and repair the directory?).