Mac pro memory problem

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

  1. LucasPro macrumors newbie

    Jul 24, 2008
    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

    Feb 24, 2008
    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

    Jul 24, 2008
    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!

Share This Page