Kingston 1600, 8GB, MacBook Pro

Discussion in 'MacBook Pro' started by MacsOnAnabolics, Jun 7, 2011.

  1. MacsOnAnabolics macrumors regular

    MacsOnAnabolics

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    #1
    I have heard lots of discussion here recently about how the 2011 MacBook Pro will support 8GB RAM @ 1600MHz. Now, I am interested in purchasing an 8GB kit for my new 2011 MBP.

    From my readings on this forum I understand that model #1: KHX1600C9S3K2/8G has been confirm to run at 1600MHz on the 2011 MBP.

    Unfortunately newegg.com is "out of stock" on this item. They do however, have another 1600MHz kit model #2: KHX1600C9S3P1K2/8G which is "in stock."

    I was wondering if anyone knows of any differences they have compared to each other, if any. Can anyone confirm that model #2 will work on the current 2011 MBP at 1600MHz.

    Thank you for any and all help! :)
     
  2. gorskiegangsta macrumors 65816

    gorskiegangsta

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    #2
    Well, first of all, which MacBook Pro model do you have? The 1600MHz RAM will run at full speed only on models with 2.2 and 2.3GHz quad i7 processors.
     
  3. MacsOnAnabolics thread starter macrumors regular

    MacsOnAnabolics

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  4. Apple Expert macrumors 65816

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    #4
    I have the second set that sell for 110.99 in my MBP (see sig). It works fine in mine. You don't need the quad core to run at full speed. Kingston has tested and confirm for it to work. See their website at the bottom of tested systems.

    http://www.kingston.com/hyperx/pnp/default.asp
     
  5. gorskiegangsta macrumors 65816

    gorskiegangsta

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    #5
    Model #2 should work fine.

    also, you may wanna try this one, it is almost the exact same model as Model #1
     
  6. MacsOnAnabolics thread starter macrumors regular

    MacsOnAnabolics

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    #6
    I've read that model will not work because the "/8GX" is the identifier for intel's XMP which is not supported by OSX.

    XMP not supported
     
  7. gorskiegangsta, Jun 7, 2011
    Last edited: Jun 7, 2011

    gorskiegangsta macrumors 65816

    gorskiegangsta

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    #7
    Yes you do. Although the system recognizes the RAM at a higher bandwidth it doesn't mean it actually runs it at a higher bandwidth.
    Benchmark it with Geekbench and you'll see. Check out my benchmark screenshot with stock 2011 MBP RAM (4GB @1333MHz) below. The 1600MHz RAM should perform marginally higher at stream: bandwidth performance (if it is indeed running at full speed).
    This is a spec sheet from Intel. Only two top i7 models that are in 2011 MBPs (2820QM [4x 2.3ghz] and 2720QM [4x 2.2ghz]) are able to run 1600MHz RAM (at 25.6 GB/s) all others run only up to 1333MHz (at 21.3 GB/s)
     

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  8. gorskiegangsta macrumors 65816

    gorskiegangsta

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    #8
    Ah, missed the ...X at the end. Good catch!
     
  9. MacsOnAnabolics thread starter macrumors regular

    MacsOnAnabolics

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    #9
    I guess I'll just order model #2 with next day air and hope for the best. Ill definitely get back to this thread and let you know if this model does indeed run at 1600MHz as well.
     
  10. Orlandoech macrumors 68040

    Orlandoech

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  11. MacsOnAnabolics thread starter macrumors regular

    MacsOnAnabolics

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    #11
  12. Apple Expert macrumors 65816

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    #12
    So your saying that my 13" i5 isn't taking full advantage of the memory speed? What should the speed look like?
     
  13. gorskiegangsta, Jun 7, 2011
    Last edited: Jun 7, 2011

    gorskiegangsta macrumors 65816

    gorskiegangsta

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    #13
    It simply can't. the max supported bandwidth is 1333mhz.

    what are your scores with the new memory? (in geekbench 32bit)
     
  14. Apple Expert macrumors 65816

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    #14
    Then something is going on here.

    Stock (4gb 1333) - 5941
    G. Skill (8gb 1333) - 6023
    HyperX (8gb 1600) - 6155
     
  15. gorskiegangsta macrumors 65816

    gorskiegangsta

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    #15
    what are the scores for Memory Performance and Memory Bandwidth Performance?
     

    Attached Files:

  16. Apple Expert macrumors 65816

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    #16
    Here are my results.

    Stock Configuration (Samsung 1333) - 5941
    G. Skill (8GB 1333) - 6023
    Kingston HyperX (8GB 1600) - 6155
     

    Attached Files:

  17. gorskiegangsta macrumors 65816

    gorskiegangsta

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    #17
    Well, the 5724/5418 is not out of the realm of possibility for 1333MHz RAM
    http://browse.geekbench.ca/geekbench2/view/369894

    [​IMG]
    [​IMG]
     
  18. Apple Expert macrumors 65816

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    #18
  19. gorskiegangsta macrumors 65816

    gorskiegangsta

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    #19
    look only at the RAM performance, ignore the processor benchmark.
    it is
    5865/5011
    5742/5311
     
  20. Apple Expert macrumors 65816

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    #20
    So your saying I'm not having any benefit by using this 1600?
     
  21. gorskiegangsta macrumors 65816

    gorskiegangsta

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    #21
    the CPU isn't capable of running it at higher than 1333mhz, unfortunately.

    I am still waiting for my 8gb G.Skill kit btw, standard shipping sucks :D
     
  22. Apple Expert macrumors 65816

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    #22
    Then why are the memory benchmarks higher with the 1600? If the cpu can't take advantage of the extra speed, it should be very similar and not about 500 points difference.
     
  23. gorskiegangsta macrumors 65816

    gorskiegangsta

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    #23
    5724/5418
    vs.
    5680/5109 (avg. of 5431/5005, 5865/5011, 5742/5311)

    is a difference of 44/309 points, which is not that significant (it even happens among 1333mhz memories.
     
  24. MacsOnAnabolics thread starter macrumors regular

    MacsOnAnabolics

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    #24
    Just bought this. Just hope I don't run into any issues. I previously tried to order this model on Amazon.com and AudioBeach sent me the wrong one! My order specifically said "/8G." However, on the actual package it was "/8GX."

    They don't know what they are doing...
     
  25. MacsOnAnabolics thread starter macrumors regular

    MacsOnAnabolics

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    #25
    I hate standard shipping. When it comes to tech I'm too impulsive and impatient.

    ...I always go next day air.
     

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