mixing DDR RAM?

Discussion in 'Computer Components' started by owain_thomas, Oct 13, 2005.

  1. owain_thomas

    owain_thomas
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    I'm about to upgrade my main PC and was wondering about dual channel RAM, specifically, can I use the 2x256MB sticks I have now with another 2x 512MB sticks to get 1.5GB of dual channel memory or do all 4 sticks have to match?

    thanks
    owain
     
  2. The Dude

    The Dude
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    dont quote me on this :devil: but i'm fairly sure as long as the two channels match you should be ok.
     
  3. owain_thomas

    owain_thomas
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    well, i'll probably just give it a go as i'm getting a pair of 512s any way, if the 256s work then fine. if not, ebay :)
     
  4. Supersonic

    Supersonic
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    That sounds about right to me, each memory channel (i.e. one pair of DIMM sockets) has to comprise the same RAM modules, but the channels themselves can differ.

    I have an nforce NF7-S which only has 3 dimm sockets, but you can put a single 512 in socket 1 (a single socket channel) and pair it with 2x256 in the other 2 sockets (a 2-socket channel) to make up 1Gb.
     
  5. mjn

    mjn
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    On some motherboards, using all 4 DIMM slots can result in reduced Mhz, sometime as low as 166mhz.
     

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