Best DDR3 RAM with a low CL?

Discussion in 'MacBook Pro' started by P90Xfit, Feb 14, 2009.

  1. P90Xfit macrumors regular

    Feb 7, 2009
    Is the lowest CL 7? Where could I get the RAM?
  2. ayeying macrumors 601


    Dec 5, 2007
    Yay Area, CA
    CL 7 is the lowest I've seen. Newegg sells them. Ebay works.
  3. J the Ninja macrumors 68000

    Jul 14, 2008
    Standard settings are 7-7-7-20 at 1.5v. Avoid stuff advertising a lower latency, or worse, a higher voltage. That "high-performance" memory is nothing but trouble in my experience.
  4. MagicWok macrumors 6502a

    Mar 2, 2006
  5. fteoath64 macrumors regular


    Nov 16, 2008
    Now the million dollar question is does the MBP EFI know how to use CL5 Ram ?. It might be coded to handle CL7 at best. I believe the older MBP cannot use faster RAM as its EFI has that limitation. Would that likely be carried forward ?.

    Some can test it by buying the Kingston CL5 and installing it then boot XP or Vista and run CPU-Z to check the exact RAM timing. I also believe it will run Command rate T2 rather than T1 as well for 4GB. This is a bit slower.
  6. J.Genius macrumors newbie

    Mar 5, 2009
    faster latency will boot...but cause problems, i tried it and it crashed the machine constantly.

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