CAS 4 or 5...?

Discussion in 'MacBook Pro' started by Midgetinabikini, Apr 18, 2007.

  1. Midgetinabikini macrumors regular

    Aug 1, 2006
    i'm going to buy my macbook pro 17" c2d, some memory. 2 sticks of 2G each.

    the only problem, is that i dont know what cas to buy, i can buy cas 4 and cas 5. im not sure what kind of memory the logic board is supporting, and i didnt find that information yet.

    please help me

  2. deadpixels macrumors 6502a

    Oct 30, 2006
    it will support cas4 or cas5 i suppose, it's only the latency speed, as long as it's the right type you'll be fine. but why put 4gb when the laptop will only use 3gb? or does the 17" address full 4gb of ram?
  3. orangemacapple macrumors 6502

    Sep 1, 2006
    it will actually address about 3.3 Gb.

    the CAS is the latency or wait time in clock cycles the ram takes to respond to an instruction. a 4 is faster than a 5.

    so, yes, you will get SLIGHTLY more usable memory
    with 2 2Gb sticks and it will run a tiny bit faster with the faster CAS4
  4. Midgetinabikini thread starter macrumors regular

    Aug 1, 2006
  5. StealthRider macrumors 65816


    Jan 23, 2002
    Yokosuka, Japan
    I can't read Hebrew, but from what is written in English, that should work without any problems.

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