cssmonster

Q: when installing memory do you have to have an even number of cards to run parallel?

I bought a 4GB card so that would be two stock and the one I bought. 3 total. Where can I find the 'carrier' thing the actuall card slips into?

 

Do I have to have 4  or can I run 3? thanks for any help.

Posted on Aug 10, 2012 8:29 PM

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Q: when installing memory do you have to have an even number of cards to run parallel?

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  • by The hatter,

    The hatter The hatter Aug 11, 2012 5:47 AM in response to cssmonster
    Level 9 (60,935 points)
    Aug 11, 2012 5:47 AM in response to cssmonster

    your question leaves me wondering what you are talking about and type of memory for what Mac model.

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Aug 11, 2012 9:58 AM in response to cssmonster
    Level 9 (61,250 points)
    Desktops
    Aug 11, 2012 9:58 AM in response to cssmonster

    RE: Mac Pro 65 lb tower computers ONLY:

     

    Mac Pro uses ECC memory 72 bits wide. Apple-specified Heatsink and temperature-reporting chip is REQUIRED, and is especially necessary for denser modules.

     

    2008 and previous: Uses dual-channel. Matched pairs are required, all slots populated is optimum. (less than all populated is slightly slower). DIMMs are plugged into Riser cards. All the riser cards you will ever need should have shipped in your Mac.

     

    2009 and later: Triple-channel memory is used. Modules in slot 3 and 4 (on each side, if dual processor chips) are shared. Three DIMMs is optimum, two is an estimated five percent slower, four is a little more than five percent slower, but more than compensated by having more RAM available. Largest DIMMs go in the lowest-numbered slots (towards the door in the first set). No riser card is used -- the processor(s) and RAM is on a large daughter card (on its own removable shelf).

     

    --------

     

    The way you asked your question makes me think you probably have a great new replacement memory that is working perfectly, but is the wrong memory for your Mac.

     

    If you deal only with Vendors who know Macs, you tell them your model and they send you the proper RAM and the proper number of modules for your proposed expansion, "Guaranteed to work in your Mac or your money back!"

  • by cssmonster,

    cssmonster cssmonster Aug 11, 2012 3:56 PM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Aug 11, 2012 3:56 PM in response to Grant Bennet-Alder

    Hi there. thanks for the response. I have a 2008 and previous. below is my info. So I guess I would have to buy another card to make four? I don't remember getting any extra riser cards. I only have the two that are in there now. I have the two memory trays. the top is upside down (pic attached). I bought the memory from macmall and spoke with a rep to make sure it would work. Looks like it should but haven't tried yet.

     

    Thanks again.

     

    Model Name:          Mac Pro

      Model Identifier:          MacPro1,1

      Processor Name:          Dual-Core Intel Xeon

      Processor Speed:          2.66 GHz

      Number Of Processors:          2

      Total Number Of Cores:          4

      L2 Cache (per processor):          4 MB

      Memory:          1 GB

      Bus Speed:          1.33 GHz

      Boot ROM Version:          MP11.005C.B08

      SMC Version (system):          1.7f10

      Serial Number (system):          YMXXXXXXXQ2

      Hardware UUID:          00000000-0000-1000-8000-0017F2050F8E

    hackintosh_mac_pro_offset1.jpeg

     

    <Message was edited by Host>

  • by The hatter,

    The hatter The hatter Aug 11, 2012 1:35 PM in response to cssmonster
    Level 9 (60,935 points)
    Aug 11, 2012 1:35 PM in response to cssmonster

    2x2GB FBDIMM DDR2 667MHz


    http://www.amazon.com/BUFFERED-PC2-5300-FB-DIMM-APPLE-Memory/dp/B002ORUUAC/

     

    Those are what I use,  they are $54 the kit, and ideal would be two kits, 8GB (one set on top, one set below).

     

    Those are Risers and hold 4 DIMMs each for total of 8 and up to 32GB (4GB FBDIMMs cost a lot more).

     

    WD Black 1TB $99

     

    SSD: Samsung 830 128GB $99

     

    http://www.amazon.com/gp/product/B0077CR60Q/

  • by gerard abraham,

    gerard abraham gerard abraham Aug 12, 2012 9:52 AM in response to cssmonster
    Level 1 (0 points)
    Aug 12, 2012 9:52 AM in response to cssmonster

    apple recommends installing ram sticks in matching pairs,be sure to degauss and seat the sticks securley...gerry tt

  • by The hatter,

    The hatter The hatter Aug 12, 2012 10:01 AM in response to cssmonster
    Level 9 (60,935 points)
    Aug 12, 2012 10:01 AM in response to cssmonster
  • by gerard abraham,

    gerard abraham gerard abraham Aug 12, 2012 12:00 PM in response to cssmonster
    Level 1 (0 points)
    Aug 12, 2012 12:00 PM in response to cssmonster

    the manual states that ram should installed in equal and matching pairs,your serial number is required when purchasing...gerry t&t

  • by The hatter,

    The hatter The hatter Aug 12, 2012 1:26 PM in response to cssmonster
    Level 9 (60,935 points)
    Aug 12, 2012 1:26 PM in response to cssmonster

    Never post or give out the serieal number: it is not needed or wanted. the Mac model ID is more than enough. And why yours was X'd out.