Mac Pro 3,1 sprite issues on screen

Discussion in 'Mac Pro' started by olsend81, Aug 3, 2013.

  1. olsend81 macrumors member

    Joined:
    Jan 1, 2013
    #1
    I am thinking about buying this mac pro 3,1 but the owner says that it is have these issues "I've boot from the factory CD, replace the video card, check the ram, did a SMC reset and a PRAM reset and get the same issuse : Rainbow sprites on the screen and the system looks up.. but if I place a full size house fan blowing on it , the system runs over night, rock steady, copying files, wiping drives, streaming Pandora.." Any idea of how big of a fix this could be the price is good I just dont want to get it and then spend tons of money fixing it if it is a mother board issue.
     
  2. DanielCoffey macrumors 65816

    DanielCoffey

    Joined:
    Nov 15, 2010
    Location:
    Edinburgh, UK
    #2
    What is the spec of the 3,1? Processor, amount of memory, model of graphics card etc?

    Remember that the memory for 3,1 models is relatively expensive.
     
  3. pastrychef macrumors 601

    pastrychef

    Joined:
    Sep 15, 2006
    Location:
    New York City, NY
    #3
    That sounds like the symptoms of a faulty video card.
     
  4. olsend81 thread starter macrumors member

    Joined:
    Jan 1, 2013
    #4
    new video card

    he said that he purchased a new video card and both seem to have the same issues
    specs are mac pro 2008 3,1
    5 gb memory
    two video cards that have been tried radeon x1900x and GT 8800 512mb
    The only thing funky about it is that it has a hp blue ray installed.
     
  5. pastrychef macrumors 601

    pastrychef

    Joined:
    Sep 15, 2006
    Location:
    New York City, NY
    #5
    In my experience, both the X1900 and 8800GT had pretty high failure rates. Both would typically fail due to heat.

    Do you have any PC video cards that you can toss in there to try out? Also, is the fan that blows at the PCI-e slots working properly?
     
  6. El Awesome macrumors 6502

    El Awesome

    Joined:
    Jul 21, 2012
    Location:
    Zurich
    #6
    Looks like something is overheating, probably the GPU.
    Ask him to check whether all fans are working - if one doesen't work, you've probably got your issue and a fan is fairly easy to replace.
    If he states that if he blows extra air inside and it works, that means there shouldn't be any major defects.

    It could very well be the GPU just overheating, and then quit working until it cooled down, so you just need to find out what isn't working.
    The issues he mentioned seem related to graphics.
     

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