Mac pro memory problem

Discussion in 'Mac Pro' started by LucasPro, Jul 24, 2008.

  1. LucasPro macrumors newbie

    Joined:
    Jul 24, 2008
    #1
    Hi,
    3 months ago I bought a mac pro from online apple store and I just noticed that in the 'about my mac' window 3 Gb memory was reported whereas I have 4 Gb present. There are 4 x 1Gb DIMM's present. 2 on Riser A and 2 on Riser b, same positions, DIMMS 1 and 2. I pulled them out to see if they were all corectly attached and they were.

    In the system profile at the tab diagnostic info this is stated:
    Laatst uitgevoerd: 24-07-08 17:29
    Resultaat: Fout (error)
    Type fout: Geheugen (memory)
    Geheugensleuf: DIMM 1/DIMM Riser B
    It's in dutch but it says there is an error in DIMM1/DIMM Riser B. The memory tab window shows this:
    DIMM Riser B/DIMM 1:

    Grootte: 512 MB --> same for DIMM Riser B/DIMM 2
    Type: DDR2 FB-DIMM
    Snelheid: 800 MHz
    Status: OK

    So the 512 Mb is present in DIMM's 1 and 2 of Riser B whereas they really are 1 Gb each. So I did a hardware test (2x, including the thorough one) but no errors were found. When I then look at the test at start-up it states that there is a memory error in DIMM1 Riser B.
    Could it be broken or is it just a bad report?
     
  2. yomibro macrumors regular

    Joined:
    Feb 24, 2008
    #2
    Take that DIMM 1 from riser B and swap it over to riser A and see if that same error followed that memory module, if it did then most likely it is faulty memory.
     
  3. LucasPro thread starter macrumors newbie

    Joined:
    Jul 24, 2008
    #3
    Nice solution :p. Tried it and the problem shifted to the A Riser so it must the memory. I'll visit an AASP. Thx for the advice!
     

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