DDR3 1866 in 2011 MBP?

Discussion in 'MacBook Pro' started by kyle1320, Jun 29, 2011.

  1. Durious macrumors 6502

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    #2
  2. Mr MM macrumors 65816

    Mr MM

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    #3
    it would actually improve performance in games, per the tests done by some x220 users.

    The intel HD 3000 is very bandwidth limited, when you use this you end up improving in that part. However for other stuff, it wont matter at all, since they usually need higher quantities not the speed of the ram

    Im trying to get this upgrade myself
     
  3. Dark Void macrumors 68030

    Dark Void

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    #4
    how do you figure?
     
  4. kyle1320 thread starter macrumors regular

    kyle1320

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  5. Dark Void macrumors 68030

    Dark Void

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  6. kyle1320 thread starter macrumors regular

    kyle1320

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    #7
    Because if getting the 1600 mHz one would give me better results, I'd rather get that.
     
  7. Dark Void macrumors 68030

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    #8
    it's really not going to be anything too noticeable..

    my advice would be to get the mhz that it was shipped with for the upmost compatibility.
     
  8. Mr MM macrumors 65816

    Mr MM

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    #9
    threads and tests on notebookreview fora.

    there was a user that was trying every game that he had, he then compiled it

    there was a difference from the amount and the speed of the ram on the performance of the games, 8gb with 1866mhz, provided as much as 10+fps
     
  9. gorskiegangsta macrumors 65816

    gorskiegangsta

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    The 1600 or 1866MHz RAM will give you only slightly better results since the i5 CPU is incapable of taking full advantage of either of them. In reality, you won't notice the difference 95% of the time. IMO it is not worth it to spend 2x amount of money on 1866 RAM when you'll do just fine with 1333; You can try the 1600 RAM and see if you like it (it, reportedly, yields slightly better results than 1333) if you're willing to pay an additional 70%, that is.
     
  10. kyle1320 thread starter macrumors regular

    kyle1320

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    #11
    Hm, 10FPS you say? I'll probably go with this: http://www.newegg.com/Product/Produ...0231472&cm_re=8gb_ddr3-_-20-231-472-_-Product :p
     
  11. kappaknight macrumors 68000

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    #12
    It seems like a couple of the reviews on NewEgg says the setup was unstable. I would love to know if others have tried it and ran it successfully.
     
  12. miamirulz29 macrumors member

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    #13
    Others on this forums have put 1866Mhz RAM in their mac and reported instability.
     
  13. kyle1320 thread starter macrumors regular

    kyle1320

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    #14
    The 2011 MacBook Pro's have the second generation (sandy bridge) i5/i7 processors which allow them to handle ram with speeds greater than 1333MHz. Were these other's processors built to handle these speeds?
     
  14. miamirulz29 macrumors member

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    #15
    Only speeds such as 1600Mhz, not 1866Mhz. Even if you buy the ram, most likely, it will clock down and run as 1600 or 1333 Mhz.
     
  15. ///KM macrumors member

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    #16
    I had the 1866 in my 2.2 MBP - it showed 1866 speeds, but kernel panics kept occurring, so it was returned for the 1600, which run great.
    Others reported the same kernel panics happening with their 2.2 & 2.3s as well. Stick with the 1600s until 1866s are available with lower latency.
     
  16. kyle1320 thread starter macrumors regular

    kyle1320

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    #17
    Alright, thanks guys. I'm gonna go with 1600 MHz when I get more RAM. :)
     
  17. daneoni macrumors G4

    daneoni

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    #18
    You will be buying RAM which has the wrong latency timings compared with stock SB RAM. Expect kernel panics.

    Also, like others have said 1333MHz is just fine. Anything more is for bragging purposes and to make you look good in benchmarks...if that.
     
  18. Mr MM macrumors 65816

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  19. alust2013 macrumors 601

    alust2013

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    #20
    The i5 and dual core i7 can't handle the 1600, their cap is 1333MHz.
     
  20. CFoss macrumors 6502

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    #21
    Unless you have a 2011 15"/17" MacBook Pro, don't bother with anything faster than 1333MHz, as the CPU doesn't support anything faster. Only the quad-core i7 found in the latest MacBook Pro supports 1600MHz RAM. Otherwise, the MacBook will simply slow the RAM's speed to what it's accustomed to, 1333MHz... or worse, it will become unstable and cause kernel panics (ESPECIALLY with the 1866MHz).
     

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