Ramjet announces DDR3-1066 RAM for Apple’s new MacBook and MacBook Pro models

Ramjet now carries DDR3-1066 RAM for the new aluminum MacBook and the black bezel MacBook Pro.

The new MacBooks and MacBook Pros have two slots, and memory is to be installed in matched pairs. Users will remove the two original 1GB modules and replace them. Ramjet offers a 4GB kit, containing two 2GB modules for $139. These modules are fully compatible with the latest Apple firmware, and are SPD configured for the MacBook and MacBook Pro.

These Ramjet 4GB kits are shipping now, and come with a lifetime warranty.

More info:
• MacBook 4GB DDR3-1066 Kit
• MacBook Pro 4GB DDR3-1066 Kit

Source: Ramjet


  1. Good question Wj.

    I’m on the verge of buying a new MBP – as more of a back-up workhorse machine. One that I can hook up to my big screens when needed. The only remaining thing holding me back is the RAM limitation.

    I feel the new MBP is capable enough for my needs [I work in the media], if only the RAM limit was 8GB instead of a paltry 4GB.

    Hmm. What to do…

  2. Since I don’t know of any DDR3 1066Mhz 4GB SO-DIMM RAM modules, it’s a moot point at the moment.

    Once those are available, it will be a question of whether the motherboard in the MacBook/MacBook Pro will be able to support it.

    Laptops always have 2 RAM slots, which means getting over 2GB needs a 4GB RAM or higher module.

  3. @HueyLong and Wandering Joe

    From what I understand the 4gb limit is hardware based, they are using a 32bit hardware interface for the memory which limits it to 4gb. I’m not sure if there will be a push anytime soon to go beyond that, word is all 32bit OS’s are address-space limited to 4gb as well, and Microsoft’s 64bit stuff isn’t going anywhere so most hardware suppliers aren’t overly interested in spending all the money to make 64bit laptop memory if the majority of the market won’t touch it.

    Hopefully Apple will be able to use Snow Leopard to push HW makers into creating the 64gb laptop memory/hardware, when that happens then things will really start snapping. ” width=”19″ height=”19″ alt=”smile” style=”border:0;” />

  4. @Wandering Joe
    The Apple Store lists the following for the new MacBook Pro:

    “2GB (two 1GB SO-DIMMs) or 4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM; two SO-DIMM slots support up to 4GB”

    I do not know if that is a hard cap. Perhaps the 4GB cap will open up when larger SO-DIMMs become available? Or, perhaps there are technical reasons that prevent the installation of more than 4GB – bus design, thermal dissipation, etc.?

    I would be interested in the answer.

  5. @MrScrith
    MacOSX supports more than 4GB. You can install 32GB in a Mac Pro. So, if there is indeed a hard cap of 4GB on the MacBook Pro, then it must be a hardware limitation of some type (e.g., only enabling 32-bit addressing, as you identified).

  6. I read in the 9to5mac site that Nvidia has confirmed tat the new macs can run up to 8 Gb of Ram, but they don’t know why apple is limiting the amount of ram the can put on it when you order it from them.

  7. The previous MBP are not compatible with DDR3. An 8 GB kit from Crucial is $1179.99. Just because the hardware platform on these new MacBooks is 32-bit, does not mean memory needs to be limited to 4 GB. Modern 32-bit architectures have been able to increase the theoretical 4 GB limit.

  8. Has anyone done tests to see the real world benefits of increasing the 2 gigs to 4 gigs? Yeah, I know it would help with parallels, and probably with doing large files in Final Cut or CS4, but would 4 or even 8 make a difference to your average consumer?

    Point me out to some benchmarks, if anyone has them. Thanks.

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