Skip navigation

RAM Upgrade question

226 Views 4 Replies Latest reply: Nov 5, 2012 9:09 PM by BDAqua RSS
romad Level 3 Level 3 (590 points)
Currently Being Moderated
Nov 5, 2012 4:18 PM

I have a 21.5" mid-2011 iMac i5 that I plan on maxing out RAM-wise. Currently I have 4 GB installed: a 2 GB module in both Bank 0/ DIMM 0 and Bank 1/ DIMM 0


Now I've always been told that you should fill the RAM banks together, so shouldn't both slots of Bank 0 be filled first, instead of 1 slot of each Bank?


Next, I've ordered 2 8GB modules so where should I put them? My options seem to be:


1. Fill Bank 0/ DIMM 1 and Bank 1/ DIMM 1 with the 8 GB modules


2. Move the current 2 GB modules to the slots in 1 above and put the 8s in the freed-up slots


3. Fill both Bank 0 slots with the 2 GB modules and the Bank 1 slots with the 8 GB modules, or vice versa


This will give me a total of 20 GB but eventually I will replace the the 2GB modules with 8GB modules to have 32 GB max.

  • BDAqua Level 10 Level 10 (114,670 points)
    Currently Being Moderated
    Nov 5, 2012 4:45 PM (in response to romad)

    Just put the new pair in the now empty slots, they're paired sideway in one line on each bank.

  • den.thed Level 7 Level 7 (23,325 points)
    Currently Being Moderated
    Nov 5, 2012 5:03 PM (in response to romad)

    Refer to the manual that came with your iMac or > iMac: How to remove or install memory


    Additional notes i5 and i7 Quad Core iMac computers come with both top memory slots populated.


    "Top" refers to the slots closest to the display; "bottom" refers to the slots closest to the stand).






    8. Insert your new or replacement SO-DIMM into the empty slot, noting the orientation of the keyway of the SO-DIMM as shown below.

    iMac, Mac Mini, iPad, iPods, Mac OS X (10.6.8), (10.8.2), Safari, iTunes, iPhoto
  • BDAqua Level 10 Level 10 (114,670 points)
    Currently Being Moderated
    Nov 5, 2012 9:09 PM (in response to romad)

    I think it still does apply, just tha the Banks are arranged differently, a Bank is crosswise, not Parallel.


More Like This

  • Retrieving data ...

Bookmarked By (0)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.