iMac G5 ALS - Memory Upgrade Q

Discussion in 'PowerPC Macs' started by rtrt, Aug 28, 2009.

  1. macrumors 6502a

    Have 2 x512M modules installed

    Size: 512 MB
    Type: DDR SDRAM
    Speed: PC3200U-30330

    And was thinking about going to 2 x 1G.

    I see it's DDR but when i look around - DDR2 is less than half the price of DDR

    So although i know it's unlikely - wanted to check if there was any compatibility between the G5 ALS and DDR2 memory?
    This from crucial uk would suggest not

    Generally speaking, motherboards are built to support only one type of memory. You cannot mix and match SDRAM, DDR, DDR2, or DDR3 memory on the same motherboard in any system. They will not function and will not even fit in the same sockets.

    Found on ebay some suggestions that 'high density' memory doesn't work in Macs - sounds like i need to be careful what i get - any suggestions here?
  2. macrumors 601


    Yup. DDR is still pretty expensive. Only the last gen iMac G5 used DDR2 so it won't fit your model G5. Just remember to install in matching pairs.

    Look for places like or as they usually have deals on DDR memory with mail-in-rebates.
  3. macrumors 6502a

    any thoughts on 'high density' memory and whether i need to consider this?
  4. macrumors 601


    I know that the G4 Macs were picky with high density memory. I don't think I heard anything about the G5 platform being as picky but maybe someone else would know?

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