Max RAM for iMac 7,1

Discussion in 'iMac' started by CarlHeanerd, Aug 5, 2011.

  1. CarlHeanerd, Aug 5, 2011
    Last edited: Aug 5, 2011

    CarlHeanerd macrumors member


    Jun 29, 2008
    Adams County, PA
    I have a 20" iMac from mid 2007, 2.4GHz C2D model. I currently have 3GB of RAM installed, just adding a 2GB stick to the existing 1GB. I am considering upgrading to the max capacity now however, I am getting conflicted reports as to how much this puppy can take. OWC listed the iMac 7,1 as taking a max of 6GB, one 2GB stick and a 4GB stick. However, Apple's documentation says that the system takes only 2x2GB sticks, 4 GB total.

    Has anyone here tried 6GB? I have found a few 4GB DDR2 667MHz sticks, so they're not too hard to find. When I think about it, what would stop me from getting 2x4GB sticks to increase to a total of 8GB?

    Anyways, what is the general consensus on this? Thanks!
  2. Jerome Morrow macrumors 6502a

    Jerome Morrow

    Jun 13, 2011
    United Kingdom
    6GB is the maximum, but i haven't tried 6GB. 8 GB might work, but most likley you will see just 6 GB.
  3. panzer06 macrumors 68030


    Sep 23, 2006
    I have one in my office. 6GB is the Max. 8GB does not work.

  4. Badger^2 macrumors 68000


    Oct 29, 2009
    The general consensus is that OWC really knows.

    Apple stops testing as soon as its released, regardless of the fact that new larger chips may be out.

    Are you sure you really need to go to 6 gigs of ram? What is making you think you need more ram? What are you doing with your iMac? $8o is kinda spendy for an older iMac (worth about $500). You will *not* see things get "faster" with more ram.

    If you havent upgraded your drive from the stock 320 gig, getting a larger and faster drive *would* speed things up, if thats what you are hoping to do.
  5. CarlHeanerd thread starter macrumors member


    Jun 29, 2008
    Adams County, PA
    I'm doing my best to make this computer as future proof as possible, I need to squeeze another 4 years out of it for university.

    I've seen benchmarks for 4 vs 6gb installs, 6 is remarkably better in this iMac's case for rendering.

    For HDD's I was looking at a 1TB WD Caviar Black. I'm competent with computers to the point where I could install it myself, so I'll save money there.

    Also I'll need a new CD/DVD RW+- drive. Mine is spotty at best.
  6. lucasanti macrumors newbie

    Oct 19, 2012
    Also interested in this issue as I have a 20inch imac 7,1 as well. I upgraded the ram to 4g from 2g last year and now I want to further upgrade it because I've found that if I am editing photos in photoshop while running other programs, my system slows down a lot and I get impatient with the constant swirling beachball.

    Some time ago I saw that a faster clock speed of the ram I bought is available. (I have 667). SO the question is really whether to get the faster speed ram if it is in fact available and compatible with my machine or whether to max it out to the 6g if in fact that is the max and not the 4g I was told when I purchased the machine back in 2007.

    These are the particulars of my machine:

    Model Name: iMac
    Model Identifier: iMac7,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 4 MB
    Memory: 4 GB
    Bus Speed: 800 MHz
    Boot ROM Version: IM71.007A.B03
    SMC Version (system): 1.20f4
    Serial Number (system): W8745JXTX85
    Hardware UUID: 00000000-0000-1000-8000-001B63B4DAFB
  7. wankel macrumors newbie

    Oct 23, 2012
    Hello guys, i have imac 7,1 too. at the monent with 4gb (2X2GB) and i will try to up it to 6gb. i found this memory:
    Module Size: 4GB
    Package: 200-pin SODIMM
    Feature: DDR2 PC2-5300
    Specs: DDR2 PC2-5300 • CL=5 • Unbuffered • NON-ECC • DDR2-667 • 1.8V • 512Meg x 64 •

    I suppose it will be good fot my mac, can some one confirm it please?


    Thanks everybody!

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