2 GB Dual Channel vs 2.5 Single Channel Advice?

So I've decided to add some ram to my old motherboard. I am about to put in two 1 GB DDR sticks

and my question is would it be faster to put the old 512 MB is the third slot even though it would be

reduced to single channel.

Any advice would help and be appreciated.
4 answers Last reply Best Answer
More about dual channel single channel advice
  1. Unless you really need the extra 512 MB, only install the 1 GB modules.
  2. I would go for the added ram. Dual channel saves you a few cpu microseconds. More ram saves you hard drive paging which is milliseconds.
  3. From my own experience, where for a while I could only get 3 of the 4 banks to work, I'd say no.
    My Win7 scores with memory with different combinations in the slots were;

    1-512mb, 2-512mb 3-empty, 4-empty ... score = 4.4 (Dual)
    1-1gb, 2-1gb, 3-empty, 4-empty ... score = 5.4 (Dual)
    1-1gb, 2-1gb, 3-512mb, 4-empty ... score = 4.1 (Single)

    Much better to be Dual.
  4. Best answer
    Since there seems to be a difference of opinion, I suggest the OP try it both ways. With the wei, you sometimes get strange results. Run superpi or some other cpu benchmark to assess the difference between dual and single channel. Some older amd chips are more sensitive to ram performance compared to the newer nehalem chips.
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