ddr2 800mhz upgrade

Discussion in 'MacBook Air, MacBook & MacBook Pro' started by miches, Jan 20, 2009.

  1. miches

    miches Member

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    Hi Guys,

    Is it possible to install 4GB RAM (DDR2 800mhz) in the early 2008 penryn macbook pros?

    Grazie,
    Miches
     
    #1 miches, Jan 20, 2009
  2. radforce

    radforce Member

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    Yes but it will just run on 667mhz. You'll save money if you just get DDR2 667mhz.
     
    #2 radforce, Jan 20, 2009
  3. Maccess

    Maccess Active Member

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    DDR2 800 Mhz running at 667Mhz will also be slower since the CAS Latency will be higher, unless you're able to find expensive low latency 800Mhz DDR2 with the same CAS Latency as DDR2 667Mhz. You're better off looking for low CAS Latency 667Mhz RAM (CAS 4 instead of 5).
     
    #3 Maccess, Jan 20, 2009
  4. miches

    miches Member

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    Thank you guys! I was thinking the penryn mbps could handle 800mhz, but i guess, i just have to replace it with 2 x 2GB DDR2 667's.
     
    #4 miches, Jan 20, 2009
  5. loko__loko

    loko__loko Well-Known Member

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    i tried placing 2pcs x 2g 800mhz on macbook, wont start up... i end up installing 667mhz instead. now the 800mhz is in our imac 2.66ghz
     
    #5 loko__loko, Jan 20, 2009
  6. Shinrai

    Shinrai Guest

    this also happened to me so i really don't suggest the 800mhz anymore to folks. Even my MBP didn't boot on this.
     
    #6 Shinrai, Jan 20, 2009
  7. miches

    miches Member

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    thanks guys! i'm getting 2 x 2GB modules this weekend, finally! :)
     
    #7 miches, Feb 11, 2009
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