Just bought 4GB of ram (2x2GB)- better to leave in default 2GB (2x1GB)or take it out?

Discussion in 'Mac Pro' started by marklight, Feb 19, 2008.

  1. marklight macrumors 6502

    Apr 6, 2006
    Just wondering if it's better to have 6 GB of mixed ram (2 2GB modules and 2 1GB modules) or if it's better to just take out the 2X1 GB and only have 4 Gb of 2 X 2GB for synching / speed purposes.
  2. ColdCase macrumors 68030

    Feb 10, 2008
    For RAM access speed, since there are four memory channels to take advantage of, its best to fill four slots (the first two slots of each riser cards) with RAM, even if there is a mismatch. The third and 4th slots are buffered by the RAM in slots one and two. So, in theory, access to those sticks is slower than the first slots. IAW, spreading 8GB of RAM over the 8 available slots is slower than spreading it over 4 slots.

    More RAM usually provides better real world computer performance than higher speed RAM.

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