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DDR2-533 and DDR2-800 which slots to use?

Discussion in 'Hardware' started by Likeatalltree, Dec 25, 2007.

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  1. Likeatalltree

    Likeatalltree Thread Starter

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    I have had a DDR2-533 512mb stick for a while and its been using up the first slot for quite a while. I just got 2 DDR2-800 1gb sticks for a gift and was wondering if i should rearrange them in the slots or what? I have 4 slots, 2 orange and 2 green. Any help would be great.
     
  2. Triple6

    Triple6 Moderator

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    It depends on the motherboard. But you might be able to use Dual Channel to increase your memory bandwidth by using one slot from each channel. On some boards you use the slots of the same color, on others you use slots of a different color to achieve dual channel. What board do you have?

    Because you have 1 x 512MB stick and 1 x 1GB stick you might not be able to achieve dual channel, but many new boards do allow you to mix memory of different sizes and still run dual channel.
     
  3. Likeatalltree

    Likeatalltree Thread Starter

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    I have an abit KN9 Ultra Mobo and i have 1 x 512MB and 2 x 1GB.
     
  4. Triple6

    Triple6 Moderator

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    In that case you could pull out the 512MB altogether and run just the 2 x 1GB sticks.

    The reason being that running three unmatched pairs rarely results in dual channel mode and it wouldn't be efficient if it did. Additionally the 533Mhz memory is going to slow down the 800Mhz memory down to 533Mhz. By removing the 533hz/512MB memory you will be increasing the speed to 800Mhz plus getting the full benefit of dual channel to double the memory from 6.4GB/s to 12.8GB/s. Running 533Mhz in single channel mode will only yield 4.2GB/s of bandwidth and 8.4GB/s in dual channel if it was a matched pair.
     
  5. Triple6

    Triple6 Moderator

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    According to the manual the board seems to only support 2 or 4 sticks in dual channel, install one stick into DIMM1 and the second into DIMM2.
     
  6. Likeatalltree

    Likeatalltree Thread Starter

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    So should i put the 2 x 1gb sticks in the same color slot or one in each?
     
  7. Triple6

    Triple6 Moderator

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    DIMM1 and DIMM2 are the same color.

    If you have the manual, its page 2-11.
     
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