800mhz ram for Macbook pro 2.4ghz?

Discussion in 'MacBook Pro' started by benjamin77, Jul 11, 2007.

  1. benjamin77 macrumors newbie

    Jul 11, 2007
    amsterdam expat
  2. koops macrumors regular

    Jun 18, 2007
    I think form reading other posts, the memory controller is 667Mhz on the board, so you can buy 800Mhz RAM but it would only run at 667Mhz and wouldn't show any benefit.
  3. benjamin77 thread starter macrumors newbie

    Jul 11, 2007
    amsterdam expat
    thanks! I thought because the santa rosa bus speed is 800mhz is would support the ram...
  4. diadem macrumors regular

    Nov 13, 2006
    It will use the full 800Mhz speed, But i wouldnt bother it uses alot of power would stick with 667Mhz ram for battery life the difrence is small anyway.
  5. WorldIRC macrumors 6502

    Sep 25, 2005
    ^How would it use the 800mhz....the memory controller only supports 667mhz ram sticks...
  6. Denali9 macrumors member

    Jun 15, 2007
  7. Cali_Man macrumors member

    Apr 5, 2005
    Amsterdam, The Netherlands
    I think it's not supported. Weird, I'm a Ben who will also soon be an expat living in Amsterdam, and will most likely be showing up with the same machine haha.
  8. Zel macrumors regular

    Jul 7, 2007
    Anyone know what's the point of an 800mhz frontside bus couples with a 666mhz memory controller?

    it doesnt make any sense... where is that 800mhz relevant to???
  9. LoneWolf121188 macrumors 6502a

    Jun 7, 2007
    Longmont, CO
    Its relevant to everything other than the memory. That includes the HDD, GPU, network card(s), etc.
  10. tejota1911 macrumors 6502

    Nov 10, 2006
    If your work is paying for it, buy the 800Mhz RAM. Your current MBP will only run it at 667Mhz, but in a future revision 800Mhz RAM may be supported. You could potentially use it at full speed in your next computer(MBP, MB, iMac, etc.). If it's on your dime, just get the 667Mhz RAM.
  11. krystox macrumors newbie

    Jun 11, 2007
    Does anyone know if the new firmware would support 800Mhz memory or not. I feel it's probably just a software lock. I was told some dell SR laptops supports PC2-6400 right?
  12. Sbrocket macrumors 65816


    Jun 3, 2007
    Its not a software lock imposed by Apple or otherwise. The memory controller in the current revision SR MacBook Pros does not support PC2-6400 RAM at its full speed...only 667MHz. The Santa Rosa platform doesn't include a memory controller that supports 800MHz RAM at its full speeds, so while you can definitely use it...you're not going to get any benefit from it.

    It comes down to the memory controller used on the specific computer. I have no idea if some Dell Santa Rosa-based laptop has a different component than the MBP, so I'm not going to make any claims about that...but the SR MBPs don't support 800MHz RAM right now.
  13. joehack macrumors member

    May 29, 2006
    There are 2 things:

    1. It's a dual channel memory controller. Hence 667MHz * 2.
    2. The CPU talks to a lot of other components. Hence, the overall throughput grows.

  14. Nightkrawler macrumors regular

    Sep 4, 2006
    Vienna, Austria
    btw. those RAMs aren't for Notebooks, SO-DIMM with 200pins are for the mb/mbp.
  15. denbysweeting macrumors newbie

    Jan 23, 2013
    Sorry to nitpick but it's 667Mhz, and not 666Mhz. The Santa Rosa spec allows for true 64-bit computing, previous chipsets didn't. I guess the 667MHz bottle neck is an example of staggered tech release...? (By Intel, not Apple.)
  16. snaky69 macrumors 603

    Mar 14, 2008
    Holy necro-bump from 6 years ago!
  17. denbysweeting macrumors newbie

    Jan 23, 2013
    Sorry, my mistake. That was Core to Core 2... I'll go away now,

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