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Thread: iMac memory

  1. #1
    iMac memory

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    iMac memory
    I have the 21.5" 2013 Imac, the one with the glued on screen. It's running pretty slow and although I've asked on here before I'm wondering if it would be worth upgrading the ram from 8 to 16 Gb. This is the one I'm talking about for A$229.00 from Macfixit here in Australia. "16.0GB (2 x 8.0GB) OWC PC12800 DDR3 1600MHz SO-DIMM 204 Pin RAM." I've watched a detailed instructional video linked to their site and am confident that I can do the job with the included kit they give you. I'd appreciate it if anyone's done this for a slow iMac and found it helps to let me know.
    An alternative I was thinking of was to use the 4TB external drive that I recently bought and cloned the HD with CCC. Does anyone think this would be the way to go?
    Pete.

  2. #2
    iMac memory
    chscag's Avatar
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    Adding more memory may give you a boost in speed and then again, it may not. Your iMac has a slow hard drive which doesn't help. In that model (your iMac) Apple used a 3.5" 5400 RPM hard drive which is slower than the larger and faster hard drives used in the 27" model.

    If you're going to take the iMac apart to add memory, you might also want to replace the hard drive with a SSD. And by the way, it's a difficult task taking the glued screen off and then removing the board to gain access to the memory slots. If you're sure you can do it with the included kit, go ahead then.

    Using an external hard drive to boot the machine (if that's what you're referring to with the 4TB drive) may actually slow things down. Booting from a SSD would be better, however, your iMac does not have USB 3.1/USB-C ports. You only have USB 3.0 ports which are slower. Changing out the internal drive with a SSD would be much faster but of course more expensive.

  3. #3
    iMac memory

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    An SSD is the answer to your slow old platter drive as Admin chscag advises.

    If it is a 2013 model it does have USB3. as do all glued screen Macs, and an external SSD used externally via USB3 will be a huge boost.
    Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  4. #4
    iMac memory

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    I hadn't thought about the external SSD. Might be worth a look. I know it has usb3, but chscag seems to be talking about the newer usb3 which from what I can gather, reading about it is getting awful complicated with the nomenclature. I am handy with physical things, but it's computers and the terminology that I sometimes can't handle, so I've no worries about putting in a new drive and/or memory. It's the money that's an object.
    Pete.

  5. #5
    iMac memory
    pigoo3's Avatar
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    Quote Originally Posted by hoody View Post
    This is the one I'm talking about for A$229.00 from Macfixit here in Australia. "16.0GB (2 x 8.0GB) OWC PC12800 DDR3 1600MHz SO-DIMM 204 Pin RAM."
    If I got the correct iMac model...16gig of ram (2 x 8gig) for your 2013 21.5" iMac is $87.99 (A$125.95)...plus shipping:

    Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013

    Could probably check out their SSD's as well:

    OWC SSD Upgrade Kits for 21.5-Inch iMac (2013 - Current)

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  6. #6
    iMac memory
    Slydude's Avatar
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    Before you invest in aditional memory try the following experiment for a bit. The results might give you a better idea whether additional memory would help:

    1. Reboot the Mac and launch Activity Monitor first. Make sure you click on the memory tab. With nothing else running the "memory pressure" area should show green.
    2. Launch other apps and go about your normal computing routine. If you normally open/use more than one program simultaneously do that as well.
    3. When things start slowing down go back to Activity Monitor and look at memory pressure again. If it's yellow or red, and that's happening consistently, additional memory may help.

    Personally, I suspect the slower hard drive is a bigger issue. This comes from someone who has invested in additional memory and not seen the performance boost I expected.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  7. #7
    iMac memory

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    Quote Originally Posted by pigoo3 View Post
    If I got the correct iMac model...16gig of ram (2 x 8gig) for your 2013 21.5" iMac is $87.99 (A$125.95)...plus shipping:

    Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013

    Could probably check out their SSD's as well:

    OWC SSD Upgrade Kits for 21.5-Inch iMac (2013 - Current)

    HTH,

    - Nick
    What a difference in prices! We all know that it costs to send these things over, but saying that, these companies pay less for freight than you and I would making the mark up eye watering.
    Pete.

  8. #8
    iMac memory

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    Slydude, I'll try that again, but when I did it before I only had one tab/app open. I'll try it again today with more stuff going on.
    Pete.

  9. #9
    iMac memory

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    I've attached a couple of screen shots of the CPU History and the Memory Pressure and now need someone to tell me what they think of the CPU History. The Memory Pressure stays in the green no matter how many apps I open and use. I had Photos going with Adobe Photoshop Elements editing, iTunes, iMovie playing a clip, along with Pages. It went really slow and I shut everything down but when I got to iMovie I got the spinning beachball and had to force quit that.

    Screenshot 2019-07-08 at 2.13.47 pm-1.jpg
    Screenshot 2019-07-08 at 2.14.26 pm.jpg
    Pete.

  10. #10
    iMac memory

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    I don't know what's going on here, but I posted two attachments in my last post and wanted to put one here as well but there's no attachment icon this time. Anyway, I found this hard drive at Macfixit (Australia): 1.0TB Micron 5100 Pro Series 2.5-inch 7mm SATA 6.0Gb/s 3D NAND Flash Ultra-High Performance Solid-State Drive (SSD) at A$170.00 inc post.
    Here's the blurb of which I understand almost nothing:
    Micron
    1.0TB 5100 Pro Series
    SATA 2.5" SSD
    2.5-Inch | SATA 6.0Gb/s

    Up to 540MB/s Read, 520MB/s Write
    Micron's 5100 solid state drive (SSD) uses a single-chip controller with a SATA interface on the system side and four channels of Micron NAND Flash internally.
    Highlights

    Hot-plug capable (2.5-inch only)
    Native command queuing support with 32-command slot support
    ATA-8 ACS-3 revision 5 command set compliant
    Enhanced power-loss data protection with data protection capacitor monitoring
    Self-monitoring, analysis, and reporting technology (SMART) command set
    Secure field-upgradeable firmware with digitally signed firmware image
    Free Installation Videos
    Warranty Safe Upgrade.
    3 Year Australian Replacement Warranty


    The SSD is designed to use the SATA interface efficiently during both READs and WRITEs while delivering bandwidth-focused performance. SSD technology enables enhanced boot times, faster application load times, reduced power consumption and extended reliability.

    The self-encrypting drive (SED) features a AES-256 encryption engine, providing hardware-based, secure data encryption, with no loss of SSD performance. This SED follows the TCG Enterprise specification for trusted peripherals. When TCG Enterprise features are not enabled, the device can perform alternate data encryption by invoking the ATA security command set encryption features, to provide full disk encryption (FDE) managed in the host system BIOS. TCG Enterprise and ATA security feature sets cannot be enabled simultaneously.

    The data encryption is always running; however, encryption keys are not managed and the data is not secure until either TCG Enterprise or ATA security feature sets are enabled.
    I spoke to someone at Macfixit about 5 minutes ago and he recommended the above drive which he says are really good and they have no comebacks. What do people think?
    Last edited by hoody; 07-08-2019 at 03:25 AM. Reason: Stoopid spelling.
    Pete.

  11. #11
    iMac memory

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    I reset the SMC by shutting down, pulling the plug for 10 seconds and restarting and now I have the message that it can't find a wireless keyboard. I haven't even got a wireless keyboard! I can't get in to do anything because I can't enter my password. I fixed this once before with help from here, but I've forgotten how. Can anyone help?
    Pete.

  12. #12
    iMac memory
    pigoo3's Avatar
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    Quote Originally Posted by hoody View Post
    What a difference in prices! We all know that it costs to send these things over, but saying that, these companies pay less for freight than you and I would making the mark up eye watering.
    For many years now...we've heard from our Australia Mac-Forums members that RAM in Australia is super expensive. I think even with Australia's "GST" and shipping costs...I think RAM is still less expensive from the United States.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  13. #13
    iMac memory
    rachalmers's Avatar
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    Quote Originally Posted by pigoo3 View Post
    For many years now...we've heard from our Australia Mac-Forums members that RAM in Australia is super expensive. I think even with Australia's "GST" and shipping costs...I think RAM is still less expensive from the United States.

    - Nick
    Everything in Australia is expensive, not just RAM.


    Sent from my iPad using Mac-Forums

  14. #14
    iMac memory
    pigoo3's Avatar
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    Quote Originally Posted by rachalmers View Post
    Everything in Australia is expensive, not just RAM.
    I think Vegimite and red soil is cheap!

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  15. #15
    iMac memory
    pm-r's Avatar
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    Quote Originally Posted by pigoo3 View Post
    I think Vegimite and red soil is cheap!

    - Nick

    And don't forget to include the bangers and beer!!!


    - Patrick
    ======

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