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  1. #1


    Member Since
    Jan 23, 2007
    Posts
    14
    MBP mem upgrade question- Non- Stacked IC's?
    At Macmemory.com the prices for MBP mem upgrade are higher but their website (MacBook Pro RAM | MacBook Pro Memory | Apple MacBook Pro Hard Drives | Ramjet Inc.) touts:


    "Non-Stacked IC's: Ramjet uses a Non-stacked module for the 4GB DDR2-667 module for the MacBook Pro. The cheaper stacked IC variety of 4GB SO-DIMM draws more power, which increases heat and decreases battery life. Ramjet ONLY uses premium non-stacked chips."

    Is there anything to this" premium non-stacked chip" business? Their prices are $30 or more higher than OWC and Crucial.

    Is there a difference between what these companies are selling?

    (I have a new MBP purchased recently)

  2. #2

    Lifeisabeach's Avatar
    Member Since
    Sep 30, 2007
    Location
    The Republic of Neptune
    Posts
    7,760
    Let me google that for you

    Best answer from the search hits:

    One double-sided DIMM holds 16 RAM chips [18 if using ECC].
    1G byte ==> 8G bits; 8G bits / 16 chips ==> 512M bits per chip.
    The least expensive "commodity" density today is 256M bits per chip.
    Achieving 1G byte from 256M bits/chip requires "stacking" another
    card. This doubles the overall thickness, and the module won't fit
    into some spaces. It also causes problems with cooling and mechanical
    reliability; but sometimes it "works" for desktop PCs.

    Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
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  3. #3


    Member Since
    Apr 08, 2011
    Posts
    3
    Specs:
    Macbook5,1 - A1278 - MB467LL/A
    false Ramjet quality claim
    Quote Originally Posted by mitchww View Post
    At Macmemory.com the prices for MBP mem upgrade are higher but their website touts:

    Non-Stacked IC's: Ramjet uses a Non-stacked module for the 4GB DDR2-667 module for the MacBook Pro. The cheaper stacked IC variety of 4GB SO-DIMM draws more power, which increases heat and decreases battery life. Ramjet ONLY uses premium non-stacked chips.
    Is there anything to this" premium non-stacked chip" business? Their prices are $30 or more higher than OWC and Crucial.
    Is there a difference between what these companies are selling?
    (I have a new MBP purchased recently)
    Their price for an 8GB package (2 modules) is $50 over everyone else's (@~ $97 - 110)!! That's 50%, and the only apparent reason is this claim.
    So I quoted the Wikipedia info that nearly nobody makes or sells chips that can be stacked anymore (modern chips are nearly all Ball Grid Array) and asked them about that -- Like, "How can I shop this spec w/ other mfr's?" This was their dodging, disingenuous response:
    Unfortunately, it is still possible to construct stacked modules, and there are stacked TSOP modules on the market right now. Ramjet does not use stacked parts in any application. This is one aspect of Ramjet always using the top quality parts available for your Mac. Thank you for your inquiry!
    When I asked OWC the same thing, they responded:
    We haven't ever used stacked chips for our PC3-8500 line of memory modules. In fact, its been a long time since we've qualified any stacked memory modules.
    I believe would apply equally to any DDR2 modules ~

  4. #4


    Member Since
    Apr 08, 2011
    Posts
    3
    Specs:
    Macbook5,1 - A1278 - MB467LL/A
    Ramjet is currently asking $150 + $8s&h for 8GB PC3-8500 - [http://www.macmemory.com/ItemDescrip...sp?Item=MBP8G]
    NewEgg has a $10 coupon thru 4/18 for G.Skill w/free s&h= $70 [http://www.newegg.com/Product/Produc...2E16820231294]

    Guess which I bought ~

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