Sultan Makende

Q: Mac Pro desktop memory configuration

I'm hoping someone out there can help me:

I have an early 2008 quad core mac pro with 12Gb of RAM installed.

I took out the memory risers and DIMMS to give them a clean but did not take note of the DIMM configuration and now I can't seem to get the full 12Gb back again.

I have tested each RAM module by putting each one in slot 1A and booting.

All modules check out ok individually.

The modules are:

4 X Hynix 2Gb

2 X Hynix 1Gb

2 X QIMONDA 1Gb

 

 

What I need to know is what should be the insertion order, i.e. what pairs go into what slots on what riser.

I am putting them in pairs as suggested, but when i do a memory check after bootup, it keeps showing some of the slots as empty.

When I power down and take out the DIMM modules, the heat sinks are all hot to the touch, even the ones that were showing as empty.
Maybe the memory check is lying to me?

Is there another way to see and test the amount of memory installed besides ABOUT THIS MAC / MORE INFO / MEMORY?

Maybe via a terminal script?

Would really appreciate any help.

Mac Pro, Mac OS X (10.7.5)

Posted on Nov 21, 2013 11:05 AM

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Q: Mac Pro desktop memory configuration

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  • by RatVega™,

    RatVega™ RatVega™ Nov 21, 2013 11:21 AM in response to Sultan Makende
    Level 4 (2,005 points)
    Nov 21, 2013 11:21 AM in response to Sultan Makende

    Here's what Apple says:

    Mac Pro (Early 2008)

  • by Sultan Makende,Solvedanswer

    Sultan Makende Sultan Makende Nov 21, 2013 11:42 AM in response to Sultan Makende
    Level 1 (4 points)
    Nov 21, 2013 11:42 AM in response to Sultan Makende

    SOLUTION FOUND:

    Ok, so fater much experimenting I have found the solution anyway, but will leave the post up for anyone else with the same problem:

     

    • RISER A:

    |slot 1: Hynix 2GB|

    |slot 2: Hynix 2GB|

    |slot 3: Hynix 2GB|

    |slot 4: Hynix 2GB|

     

    • RISER B:

    |slot 1: Hynix 1GB|

    |slot 2: Hynix 1GB|
    |slot 3: QIMODA 1GB|
    |slot 4: QIMODA 1GB|

     

    Just to make sure that everything started at zero, I also reset SMC first by:

     

    1. disconnecting the mains cable
    2. holding the start button for 15 seconds
    3. disconecting mains cable again
    4. inserting memory risers as stated above.