Timing vs speed

what is more important in ram, the timing or the speed?

ie 7-7-7-20 at 1066 or 9-9-9-24 at 1600

and how much of a difference will this affect my build (or is it negligible?)

6 answers Last reply Best Answer
More about timing speed
  1. id go with the 1600 ram, however real life performance difference would be pretty small
  2. i forgot to add this as well but if i buy 1600 ram and my mobo only supports 1333 will it just drop down to the lower speed automatically or do i have to manually adjust it
  3. Best answer
    If you aren't going to OC,go for the cheaper one because the difference isn't noticeable in general apps/gaming.
    However if you are going to OC,it depends on the CPU you are getting,if you are getting an Intel Core i5/i7,then i would choose DDR3 1600
  4. Yea itll auto drop to 1333 or whatever your CPU supports, but then you can go into bios and put it back to 1600
  5. Best answer selected by neraken.
  6. A simple analogy would be .... "What's more important to me getting to work on time, the sped limit or how many stop signs and lights I deal with. "

    The sped of the memory is like the speed limit fast it goes, when it's going. CAS is like the stop signs / traffic lights's how long the memory waits between each instruction.

    A 920 at default will run memory at 1066 w/ 133 BCLK

    133 BCLK x 8 mem multiplier = 1066
    133 BCLK x 20 CPU multiplier = 2.66 GHz

    Memory OC
    133 BCLK x 12 mem multiplier = 1600
    133 BCLK x 20 CPU multiplier = 2.66 GHz

    System OC
    167 BCLK x 8 mem multiplier = 1333
    167 BCLK x 20 CPU multiplier = 3.33 GHz

    System OC
    200 BCLK x 8 mem multiplier = 1600
    200 BCLK x 20 CPU multiplier = 4.00 GHz

    So how much memory speed you buy most often depends on just how high you wanna OC. CAS Latency OTOH, relates to how long of a "stop" the memory takes between instructions.
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