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Mac Thread, Early 2008 Mac Pro RAM Installation in Technical; Hi Assuming all goes to plan ( touch wood ) I should be getting 16gb of Kingston RAM for my ...
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    mac_shinobi's Avatar
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    Early 2008 Mac Pro RAM Installation

    Hi

    Assuming all goes to plan ( touch wood ) I should be getting 16gb of Kingston RAM for my 2008 Mac Pro ( 4 * 4gb )

    I have the standard installation of RAM ( 2gb so 2 * 1gb memory modules ) which is as follows :

    A1 - 1gb A2 - 1gb

    All other slots empty

    All the 1 slots I presume are the top riser card - Riser Card A
    All the 2 slots I presume are the bottom riser card - Riser Card B

    A1 - 4 Gb -- A2 - 4 Gb

    B1 - 4Gb -- B2 - 4 Gb

    C1 - - Empty -- C2 - 1 Gb

    D1 - Empty -- D2 - 1 Gb

    Is this how I would install the RAM - so all slots on the top riser card is full and there are only 2 empty on the bottom riser card ( C1 and D1 )

    ????

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    Knowing nothing about macs I'm not sure but if you're saying you currently have a matched pair in A1 and A2 why are you putting them into C2 and D2 and not C1 and C2 (or D1 and D2) like the existing?

    (also, are the new the same speed as the existing, be careful you might get better performance out of the 4x4 new and not using the existing 2x1 if it's going to throttle down)

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    Ric_'s Avatar
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    II would imagine that the slots are paired... hence why you are using A1 & A2 at the moment. You therefore need to fill C1 & C2. Don't hold me to that though (it is a Mac after all)!

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    There was this video ( that Arthur ) Pm'ed me some time ago

    Mac Pro (2008) Memory (High Quality) Installation Video at OtherWorldComputing.com

    I wont have enough dosh to get enough ram modules to fill / populate all memory slots so just need to know where they go - yes they are paired as far as I am aware.

    I was under the impression that the higher density modules go in the lower numeric slots ie A1, B1, A2, B2 so hence why I was going to put the 4 * 4gb memory modules at the start so A1, A2, B1 and B2 have a 4gb memory module each and then C2 and D2 would be the 1gb memory modules
    Last edited by mac_shinobi; 22nd December 2010 at 02:45 PM.

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    As is printed on the inside of the door of the Mac Pro, FB-DIMMs must be installed in a particular order as well. The default configuration shipped with a pair of 512 MB FB-DIMMs installed in the first and second slots (towards the "gold fingers" in the top riser card), which leaves six slots free. The next pair of FB-DIMMs must be installed in the first and second slots of the bottom riser card, the next pair in the remaining slots of the top riser card (slots three and four), and finally the last pair in the last two slots (three and four) of the bottom riser card.
    How do you upgrade the RAM in the original Mac Pro? How much RAM of what type does it support? @ EveryMac.com

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    Am sure that was the original mac pro from 2006 or there abouts. I have the 2008 model which came with 1gb in riser card A and 1 gb in riser card b ( total of 2gb )

    Also the ram as shown in the link is 667 Mhz, not 800

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    *shrugs* it says revised in 2009.

    I'm just googling.

    Did you look on the inside of the case door to see if it provides info on there?

    Regardless of the speed I suspect they would have kept to the same conventions if they are still deploying on two riser cards aligned in the same way regardless of the 'size'.

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    Ric_'s Avatar
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    Quote Originally Posted by kmount View Post
    Regardless of the speed I suspect they would have kept to the same conventions if they are still deploying on two riser cards aligned in the same way regardless of the 'size'.
    Have you ever tried to do any maintenance on a Mac? It wouldn't surprise me if you had to put them in upside-down and point the computer north for it to work

  9. Thanks to Ric_ from:

    kmount (22nd December 2010)

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    Quote Originally Posted by Ric_ View Post
    Have you ever tried to do any maintenance on a Mac? It wouldn't surprise me if you had to put them in upside-down and point the computer north for it to work
    Fortunately not!

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    Read the Manual and looked inside the cover and not very descriptive in respect to where to insert different size memory modules although reading about its meant to help if you put the larger memory modules nearer the front so A1, A2 and B1, B2

    So I would have filled the First Riser with 2 pairs - presumably one 4gb pair and one 1gb pair and on the bottom riser I would have one pair of 4gb with the last 2 slots empty on Riser B

    As a side note I will be getting an anti static wrist strap from flea bay - any suggestions on one and also what am I clipping it to , the mac tower which is made of aluminum or what exactly ?

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    This is the config I would go with....

    Code:
    Top Riser
    A1: 4GB
    A2: 4GB
    A3: 1GB
    A4: 1GB
    
    Bottom Riser
    B1: 4GB
    B2: 4GB
    B3: ----
    B4: ----
    According to Intel's documentation for the MCH used in your 2008 Mac Pro (see section 5.3.1), each riser card is treated as a separate "branch". To get the best performance you need to put the highest capacity FB-DIMMs in the first two slots in each riser (A1/A2 and B1/B2) so they are "balanced". At least that is the way I understood it.

    The following diagram shows all of the different configurations when using 512MB, 1GB or 2GB FB-DIMMs. Your proposed configuration is closest to #10B, but instead of using 2GB FB-DIMMS you would use 4GB FB-DIMMs.

    Last edited by Arthur; 22nd December 2010 at 08:37 PM.

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    mac_shinobi (23rd April 2011)

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    That's how I will do it then, scrap the anti static wrist strap. Just posted this one as wanted to post the video ref showing how the other person advised to do it which is clearly a hoax / load of bull ******



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