MP2.66 Memory Upgrade assistance

Discussion in 'Mac Pro' started by Catch Them, Jul 29, 2008.

  1. Catch Them macrumors regular

    Joined:
    Jul 29, 2008
    #1
    I recently I found a deal for Transcend memory (from the forums) for 65$ for 2Gb chips, so i purchased two from newegg for my 2.66 Quad.
    (this here: http://www.newegg.com/Product/Product.aspx?Item=N82E16820208200)

    I have 4x512 Stock memory plus an additional 2x512 from a different 2.66 (they upgraded all theyre memory and i got the 2 chips from them)


    i get the 2x2GB chips today i put them in, the bottom last 2 slots and boot up into all the OS's run some apps and all seems to be working fine.

    Then i start running Rember and then after about an hour or so i get a kernal panic and then my system starts taking forever to boot, then kernal panics on start up, first time ever.

    i remove all the memory and test the new ones with Apple HArdware test (extended test) and they turn out fine, no issues reported, i boot into the OS's (10.4.11, 10.5.4 and XP Sp2) and works like a champ.

    I test the Stock 4x512 chips and they test fine
    I test the 2x512 obtained chips and they test fine.

    is there a real issue with having 6x512 + 2x2GB in the MacPro at the same time?
    and is there a recommended configuration with them with this amount of memory?

    (my set up is this with the 7GB)
    Riser A Slot 1 - 512MB (Stock
    Riser A Slot 2 - 512MB (Stock)
    Riser A Slot 3 - 512MB (Second Hand)
    Riser A Slot 4 - 512MB (Second Hand)

    Riser B Slot 1 - 512MB (Stock)
    Riser B Slot 2 - 512MB (Stock
    Riser B Slot 3 - 2GB (Transcend - new memory)
    Riser B Slot 4 - 2GB (transcend - new memory)

    thanks in advanced for any suggestions!
     
  2. matt321 macrumors member

    Joined:
    Oct 27, 2007
    #2
    Try this config:

    Riser A Slot 1 - 512MB (Stock)
    Riser A Slot 2 - 512MB (Stock)
    Riser A Slot 3 - 2gb Transcend
    Riser A Slot 4 - 2Gb Transcend


    Riser B Slot 1 - 512MB (Stock)
    Riser B Slot 2 - 512MB (Stock)
    Riser B Slot 3 - Empty
    Riser B Slot 4 - Empty


    See if you can get through Apple Hardware test and Rember. It could be that the new OEM memory doesn't like the other OEM memory.
     

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