Upgrading 2011 iMac with old memory (RAM)

Discussion in 'iMac' started by Nihilius, Nov 2, 2012.

  1. Nihilius macrumors newbie

    Aug 7, 2012
    My sister has 2011 iMac currently with 4GB memory. She would like to have more and I was wondering if I could salvage a few years old computer for memory. I would like to know if such old RAM would even work with 2011 iMac. System Information software gives following information about the memory that old PC has installed (I don't know what is relevant so I'm just going to include everything):

    Memory Type DDR2 [PC2-6400]
    Manufacturer Kingston
    Model 99U5429-007.A00LF
    Serial Number 162A8131
    Capacity 2048 MBytes
    Speed 400 MHz (400 x 2 = 800)
    Manufacturing Date 2008, Week 27
    EPP SPD Support No
    XMP SPD Support No
    Supported Frequencies 266 MHz, 333 MHz, 400 MHz

    PC has two of these units so with both of these iMac could be upgraded to 8 GB total

    I did some searching and found out that 2011 iMacs should be installed with 1333Mhz RAM. If I understood correctly the memory in question is 800Mhz. I didn't find any information if this kind of memory is supported or not.

    So could I install this old memory to my sisters iMac? I know that memory is quite cheap these days but we are really looking for a budget solution here. Would this slower older memory have any negative effects on iMacs performance compared to just using the 4GB currently installed? Would the machine be significantly faster if I used 1333MHz memory?
  2. mac.ross macrumors member

    Oct 27, 2012
    Wrong speed, wrong rate, won't even physically fit.

    iMac uses SODIMM rather than full size
  3. FlameofAnor macrumors regular

    Feb 23, 2011
    Nope, won't work, so don't waste your time.

    Memory prices for the 2011 iMacs has really come down anyway. You can get 16GB (2x8GB) from Crucial for under $90 these days.
  4. Nihilius thread starter macrumors newbie

    Aug 7, 2012

Share This Page