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How much RAM can my Macbook Pro hold MAX?

41489 Views 17 Replies Latest reply: Jun 5, 2012 2:48 PM by The Fonger RSS
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timmytapeworm Level 1 Level 1 (5 points)
Currently Being Moderated
Jan 23, 2011 11:21 AM
Can my Macbook Pro hold a MAX of 8GB or is it just 4GB? I'm getting different answers online and I'm a little annoyed at this point. My computer specs currently are:

15 inch Laptop
MacBook Pro 2.6 GHz Intel Core 2 Duo
2 GB 667 MHz DDR2 SDRAM.

Got my computer in 2009.

At Crucial.com it says it can hold up to 8GB when I select my computer processor speed from their list, but I noticed it saying DDR3 (and I don't know what that means to be honest). Here's the link:
http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=7F3A5584A5CA7304
To the best of my knowledge I selected the correct computer, which I own, from their list.

Under "About This Mac", on my computer, it says DDR2 for the memory, on Crucial.com it says DDR3. As a result I'm confused and will that cause problems?

I'll be getting my RAM kit from Crucial.com, so do I buy the 4BG kit, because that's all my laptop can handle, or is it OK to get the 8GB kit, which says DDR3?

I do a lot of video and audio, so I would like to get my RAM up to 8 GB if it will.

Thanks
MacBook Pro 2.6 GHz Intel Core 2 Duo, Mac OS X (10.5.8), 2 GB 667 MHz DDR2 SDRAM, Using built in sound for now.
  • Matt Leader Level 2 Level 2 (165 points)
    Currently Being Moderated
    Jan 23, 2011 11:28 AM (in response to timmytapeworm)
    I was under the impression it could hold 4Gb max but your core 2 duo is a few years newer than mine, maybe 8 is feasible. Check over at OWC, they have a very good reference system for all models and lots of info to help out.

    Matt
    Mac Pro Quad Core 2.66 <> MBP 17" <> MBP 15" i7, Mac OS X (10.6.6)
  • eww Level 9 Level 9 (52,975 points)
    Currently Being Moderated
    Jan 23, 2011 1:13 PM (in response to timmytapeworm)
    Apple supports up to 4GB of RAM in your machine, but it can actually use up to 6GB (one 2GB and one 4GB module). 8GB won't work. Your machine requires PC2-5300 (667MHz) DDR2 SDRAM. The RAM linked in your post is for a unibody MBP, but that's not what you have.

    Go to this page:

    http://www.crucial.com/mac/index.aspx

    Click the blue button to download the RAM configurator, and run it on your MBP. It will identify the Crucial products that are right for your machine.

    No MBP that uses DDR2 memory can use 8GB of it.

    Message was edited by: eww
    15" '08 UMBP 2.4GHz/4G/500G XT; TiBook 1GHz/1G/120G; iPhone 3G, iTouch 32G, Mac OS X (10.6.6), scanners, projector, tablet, laser and photo printers, Pentax K-7, Olympus E-10
  • eww Level 9 Level 9 (52,975 points)
    Currently Being Moderated
    Jan 23, 2011 5:18 PM (in response to timmytapeworm)
    Yes and yes.
    15" '08 UMBP 2.4GHz/4G/500G XT; TiBook 1GHz/1G/120G; iPhone 3G, iTouch 32G, Mac OS X (10.6.6), scanners, projector, tablet, laser and photo printers, Pentax K-7, Olympus E-10
  • Alex_miksa Level 1 Level 1 (30 points)
    Currently Being Moderated
    Jan 26, 2011 4:51 AM (in response to timmytapeworm)
    If the ram module that is 6400 speed is backwards compatible it will revert to the lower clock speed. Honestly it is better for your machine to have the same speed for the ram. So most likely it will work just like you said it will just use the slower of the speeds. As far as the 6GB I am not sure about that, the 2009 years were when they went from ddr2 to ddr3 and I know the ddr3 computers go up to 8GB and when we pull up the specs for computers it usually says just 4GB max. But if people have successfully put 6 in then go for it.
    MBP 13, Mac OS X (10.6.6), 8gb g.skill ram cl 7, g.skill 120gb SSD with sanforce firmware
  • Alex_miksa Level 1 Level 1 (30 points)
    Currently Being Moderated
    Jan 26, 2011 5:31 AM (in response to timmytapeworm)
    I have to be careful but I cannot give my work email out but if you email me at madesorgo@gmail.com with your serial number of your computer... I can look up the specs for you on your computer and gives you an exact answer... i just dont have access to that info from home... shhhhhhh if you know what i mean :P ive said too much
    MBP 13, Mac OS X (10.6.6), 8gb g.skill ram cl 7, g.skill 120gb SSD with sanforce firmware
  • Alex_miksa Level 1 Level 1 (30 points)
    Currently Being Moderated
    Jan 26, 2011 5:32 AM (in response to Alex_miksa)
    otherwise was it purchased early 2009, mid 2009, late 2009? i can check in the database without the SN but im under the impression from my experience its a max of 4gb
    MBP 13, Mac OS X (10.6.6), 8gb g.skill ram cl 7, g.skill 120gb SSD with sanforce firmware
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