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Introduction

For an easy power boost, replace the RAM—the only upgrade that doesn't require cutting the adhesive behind the display.

  1. While holding the display steady, use the flat end of a spudger to press in on the RAM door release button, located just above the power port. You may have to press fairly hard—keep at it until the bottom of the door pops out about 0.25" from the rear of the iMac.
    • While holding the display steady, use the flat end of a spudger to press in on the RAM door release button, located just above the power port.

    • You may have to press fairly hard—keep at it until the bottom of the door pops out about 0.25" from the rear of the iMac.

  2. Pull the RAM access door off the back of the iMac. Pull the RAM access door off the back of the iMac. Pull the RAM access door off the back of the iMac.
    • Pull the RAM access door off the back of the iMac.

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  4. The RAM tray is locked into its upright position with two grey tabs. Use your thumbs or index fingers to unlock the tray by pushing the tabs outward, away from the RAM. Pull the tabs out and down, swinging the RAM tray down to a near-horizontal position.
    • The RAM tray is locked into its upright position with two grey tabs.

    • Use your thumbs or index fingers to unlock the tray by pushing the tabs outward, away from the RAM.

    • Pull the tabs out and down, swinging the RAM tray down to a near-horizontal position.

  5. Remove a stick of RAM by grabbing it with two hands and pulling straight out of the RAM tray. RAM modules are keyed so that they can only be installed in the proper orientation. Note where the shorter section of contacts is when removing, and reinstalling, your RAM. To install a new module, insert the module into the desired slot in the tray and press it firmly in place. Push the tray back up until it locks in place.
    • Remove a stick of RAM by grabbing it with two hands and pulling straight out of the RAM tray.

    • RAM modules are keyed so that they can only be installed in the proper orientation. Note where the shorter section of contacts is when removing, and reinstalling, your RAM.

    • To install a new module, insert the module into the desired slot in the tray and press it firmly in place. Push the tray back up until it locks in place.

    • Re-insert the RAM access door back into its place.

    "Note that the shorter section of contacts should be on the left when installing new modules."

    Mine is flipped so the shorter section of the RAM module is on the right.

    calebx - Reply

    Mine is flipped too… not a mistake, is it?

    Kristi Mathias - Reply

    What do think about extending step4 with the following:

    Please remember direction of shorter section for later installing of upgrade RAM.

    or so ...

    FrankSPhoto - Reply

    To add:

    The RAM door is not symmetrical. When putting back the RAM door, it should flush with the back. In STEP 1 photo of the RAM door it seems the RAM door is not fully flushed and aligned.

    Chi - Reply

    Hi, how many RAM slots are available. In the system overview there are 4 slots and only 2 of them are used with the current setup.

    big blue - Reply

    Does replacement RAM have to made in “matched pairs”? For example, if I add an additional 32G (2x16G) to the base 8G (2x4G) can the new 16G DIMMS go in any slots or do they need to be placed into specific “matched” slots - (slots 1 & 3 and slots 2 &4)?

    Can I “mix and match” different capacity and manufacturer RAM DIMMS or do they all need to be the same ?.

    richardkpallo - Reply

    From the Apple website for replacing ram in an iMac: https://support.apple.com/en-us/HT201191...

    For iMac’s released 2012 onwards there is no note about the position of ram or matching pairs.

    For iMac’s released 2009-2011 there is this note:

    i5 and i7 Quad Core iMac computers come with both top memory slots populated. These computers will not start up if only a single DIMM is installed in any bottom slot; these computers should operate normally with a single DIMM installed in any top slot.

    Core Duo iMac computers should operate normally with a single DIMM installed in any slot, top or bottom. ("Top" and "bottom" slots refer to the orientation of the slots in the pictures below. "Top" refers to the slots closest to the display; "bottom" refers to the slots closest to the stand.)

    There is a number of comments to say you should stagger the ram and make sure i=identical ram modules share the same DIMM number, not the same BANK number. How to couple RAM Modules in iMac 27?

    Adam Dunn -

    Does ram from iMac 27 late 2013 suit these imac or do i need to buy others?

    Bertil Woltynski - Reply

Conclusion

To reassemble your device, follow these instructions in reverse order.

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One Comment

If you have two original RAM sticks, they're installed in alternating slots, so there's no need to move anything around to install two more - just use the empty slots.

matt - Reply

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