Mac Pro 1,1 - Expansion Slot Utility - running below maximum speed

Discussion in 'Mac Pro' started by luisramz, Oct 10, 2014.

  1. luisramz macrumors newbie

    Oct 10, 2014
    Hello everybody

    After getting a bad diagnose for my old mac pro 1,1. my cinema display and 4gb (2x2gb) of ram memory were broken and I was left with a working 1gb (2x512mb) cpu... :(

    I bought a NEC EA244WMi 24" monitor and 8gb (2x4gb) ram memory and put everything in place

    After the first boot I got 9gbs and a working monitor but also a weird message from the expansion slot utility which I am attaching here


    also here is my graphics/display screenshot


    This is the first time I get this message and I am not sure what it is, hope you can give me some help or advise

  2. Antoni Nygaard macrumors 6502a

    Antoni Nygaard

    Jun 23, 2009
  3. 666sheep macrumors 68040


    Dec 7, 2009
  4. zayaso macrumors member

    Sep 29, 2014
    Your card appears to need a x16 PCI-E (16 lanes)interface to work properly and your MP has 4 PCI-E slots for a max total of 26 lanes.
    By default your first slot is x16 , second is x1, third & fourth is x4 (25 lanes with your max being 26). However, if you introduce another PCI-E card into your system, your MP will ask you how to configure your lanes- the screenshots you provided.
    According to your screenshot, slot #1 is vacant- move your card there and the problem should be resolved.
  5. luisramz thread starter macrumors newbie

    Oct 10, 2014
    Problem solved

    I changed the graphics card to slot 1 and here it goes!!


    Thank you very much guys!!
  6. zayaso macrumors member

    Sep 29, 2014
  7. ulrich norman macrumors newbie

    ulrich norman

    Jul 12, 2017
    Is it possible to run slot3 with 8times rather than slot4. I have two ATI-Radeon HD 5770 1024MB. Each card occupies 2 slots. The first card goes to slot 1. The only configuration offered by the expansion slot utility with 8x for a second slot is for slot 4. But the card can only be put in slot 3, because it is too thick. Thats why I am asking how to change the configuration to
    slot 4
    slot 3 8x
    slot 2
    slot 1 16x

    or slot 1 and 2 to 16x
  8. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    I don't think so. But I believe the performance impact is just few % (unless some specific software that really bandwidth limiting), you may run some benchmarking software to test it.
  9. orph macrumors 65816

    Dec 12, 2005
    im not even shore if a 7300 GT will have speed problems even with a 8x lane, if you want to keep it in slot 2.

    in windows my GTX770 is only on a x16 lane and in afterbuner i tend to only see the lane being 20-30% used, if i remember ill try luxmarks and see what usage is (as i gess that may be more than in games?)

Share This Page