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  1. #1
    Mac Pro RAM questions
    Icicle's Avatar
    Member Since
    Nov 11, 2004
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    Spokane Wa
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    178
    Specs:
    MacPro 2 x 3Ghz Dual Core Nvidia 8800, 7 gigs ram Macbook pro 2011 Intel i7 triple boots Ubuntu/Win7
    Mac Pro RAM questions
    Wow, Im new to this whole 2 processor thing I guess.....

    DO I have to buy 2 DIMMs in order to pop them in my new 3.0 Ghz Mac pro?

    I bought one http://www.newegg.com/product/produc...82E16820161044 and My computer isnt recognizing it at all unless I pop it into one of the slots in place of a stock one, and then it only recognizes 512MB of it (assuming because thats all the other stock one left in is?)

    So, to clarify, I assume I need two? and they need to be in the second set of DIMMs right? (2 on top card, 2 on bottom card)

    Can I just go to COMPUSA and buy another one? or do I need to order the exact same one from newegg so they match?

    Thanks guys, I thought I was pretty good at this stuff, I think I just got a wake up slap from the tech gods....
    Kevin, Spokane Washington USA

  2. #2
    Mac Pro RAM questions
    Alexis's Avatar
    Member Since
    Apr 20, 2006
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    2,255
    Specs:
    Al iMac 20" 2.4Ghz Intel Core 2 Duo
    It says server RAM, which may be causing the problem?

  3. #3
    Mac Pro RAM questions
    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
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    26,206
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '11 1.8 i7 4GB 10.10; 21" iMac '13 2.9 i5 8GB 10.10; 5s & 5c
    Per the Mac Pro Manual on changing / adding memory and available here - memory must be added in pairs and each module within a pair must match and be from the same manufacturer. Pairs do not need to match each other.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  4. #4
    Mac Pro RAM questions
    Icicle's Avatar
    Member Since
    Nov 11, 2004
    Location
    Spokane Wa
    Posts
    178
    Specs:
    MacPro 2 x 3Ghz Dual Core Nvidia 8800, 7 gigs ram Macbook pro 2011 Intel i7 triple boots Ubuntu/Win7
    Awesome, thanks for the instructions link and info, I will just order another one then.
    Kevin, Spokane Washington USA

  5. #5
    Mac Pro RAM questions
    novicew's Avatar
    Member Since
    Jan 04, 2006
    Location
    Hamburg, Germany
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    1,385
    Specs:
    MacBook Pro | iMac(2.1 G5) | MacBook(2.16 C2D) | MacMini (1.67 CD) | iPhone 4 | iPad (3rd Gen)
    You seems to have bought the wrong RAM. Take a look at this article.

  6. #6
    Mac Pro RAM questions
    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
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    26,206
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '11 1.8 i7 4GB 10.10; 21" iMac '13 2.9 i5 8GB 10.10; 5s & 5c
    Don't know about this being the wrong RAM. According to Wintec's page it meets all the specs except they do not mention if it is registered or unregistered memory.

    While I am not familiar with Wintec, most memory manufacturers will list registered memory in their specs while with un-registered memory they will make no mention of it.

    A quick call or e-mail to Wintec should answer the question.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  7. #7
    Mac Pro RAM questions

    Member Since
    Oct 27, 2005
    Posts
    4,702
    Well it seems everyone beat me to it but here is my 2 cents worth.

    The Mac Pro computer introduced in August 2006, based on the Dual-Core Intel Xeon processor, provides eight RAM slots that accommodate 240-pin SDRAM Fully Buffered DIMMs (FB-DIMMs) up to 1.25 in height and up to 1 in width. The FB-DIMMs must be PC2-5300 compliant and must be unregistered, 8-byte, nonparity, and ECC.

    The Mac Pro ships standard with two 512 MB, 667 MHz, SDRAM FB-DIMM installed, for a total of 1 GB. The largest capacity FB-DIMM supported is 2 GB, with a maximum memory capacity of 16 GB.

    The memory controller supports 512 MB, 1 GB, and 2 GB FB-DIMMs, installed in identical pairs.

    The width of each 667 MHz memory bus is 72 bits (including ECC). The Mac Pro supports a CAS latency of 5.

    FB-DIMMs made by other manufacturers that do not include a sufficient heat sink may cause the fans to run faster (and louder) or the memory chips to run slower so as not to overheat.

  8. #8
    Mac Pro RAM questions
    Icicle's Avatar
    Member Since
    Nov 11, 2004
    Location
    Spokane Wa
    Posts
    178
    Specs:
    MacPro 2 x 3Ghz Dual Core Nvidia 8800, 7 gigs ram Macbook pro 2011 Intel i7 triple boots Ubuntu/Win7
    Its the right RAM, it works with one of the stock ones actually, I was just unaware of the needed matching pairs until you guys mentioned it, THanks for all the info I will just order another and be all set with a GIG more than I planned on, not a bad thing altogether I guess

    Thanks all for the friendly help

    Loving this new machine
    Kevin, Spokane Washington USA

  9. #9
    Mac Pro RAM questions

    Member Since
    Jan 11, 2007
    Location
    Toronto, Ontario
    Posts
    86
    Specs:
    MacBook Pro 2.0Ghz(CD)/512/80/128MB VRAM/15"
    do the mac pros come stock with ECC memory? pairing ECC and non-ECC will cause issues.

  10. #10
    Mac Pro RAM questions

    Member Since
    Oct 27, 2005
    Posts
    4,702
    Taken from post #7:

    The FB-DIMMs must be PC2-5300 compliant and must be unregistered, 8-byte, nonparity, and ECC
    .

  11. #11
    Mac Pro RAM questions

    Member Since
    Jan 31, 2007
    Location
    Toronto, Canada
    Posts
    3
    Specs:
    MacPro
    All the MacPro models must be paired ... Must be matching pairs these are dual channell modules so if you use different modules in a pair your computer will be intermitant crashes and kernel panics .... Put each module matched in pairs of 2 ... then you may use other brand for secong 3rd and 4th pair.
    Let me know if it helped.
    Fijiji

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