Confusion on Amount of RAM for 2007 Quad core

Discussion in 'Mac Pro' started by tigress35, Apr 5, 2008.

  1. tigress35 macrumors newbie

    Apr 5, 2008
    I've got a quad core mac pro and I'm looking to put more RAM in than the originally shipped 1 gig (2 x 512). I've seen all the helpful links for what chips to put in which riser, however I've also seen people mention keeping things in multiples of 4 or 2.

    I'm looking to put in 2 x 2 for 4 additional gigs, and keeping the original 1 gig. This would bring me up to 5 gigs total, but is it a bad idea to have 5 since that is an odd number? Or is it ok because it uses up 4 slots? 6 gigs might be a little more than I can presently afford/truly need. TIA!
  2. aaronw1986 macrumors 68030

    Oct 31, 2006
    Odd is ok, you just must have pairs which you will. The thing with odd is that quad channel won't work, but it does not seem to offer much performance over dual.
  3. CanadaRAM macrumors G5


    Oct 11, 2004
    On the Left Coast - Victoria BC Canada
    That is fine. Put the 2 x 2 in Riser A, first two sockets, and the Apple RAM in Riser B first 2 sockets.
  4. tigress35 thread starter macrumors newbie

    Apr 5, 2008
    Thanks! I think I read on another thread that a user suggested simply switching the risers, versus having to swamp the RAM. Is that ok to do?

    And, if in the future I want to add another 4 gigs (2 x 2), for a total of 9 gigs, would that make it a "quad channel?" despite still being an odd number? I attempted to google this and couldn't find much that clearly explained the difference between a quad channel and dual channel.

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