1333MHz or 1666MHz DDR3

Discussion in 'MacBook Pro' started by yusukeaoki, Aug 19, 2011.

  1. yusukeaoki, Aug 19, 2011
    Last edited: Aug 17, 2013

    yusukeaoki macrumors 68030

    yusukeaoki

    Joined:
    Mar 22, 2011
    Location:
    Tokyo, Japan
    #1
    Hi guys,
    so I'am in urgent need of 8GB RAM due to slow down since 10.7.1 and wondering if 1333 or 1600 DDR3 is the best. I heard MBP only supports 1333 but recently I heard that 2011 MBP's can take up to 1600.

    Apple also said it only supports up to 1333, but I think its just like the max RAM where Apple said only 8GB but it actually supports up to 16GB.

    Has anyone successfully ran 1600MHz 8GB before?
     
  2. nickcao macrumors member

    Joined:
    Mar 24, 2011
    #2
    its depends on the CPU, for intel cpu, the memory countrol unit is build in the CPU, 2.0G only supports 1333MHz, but both 2.2G and 2.3G support 1600MHz. The detail can be checked from intel webside.
     

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  3. yusukeaoki thread starter macrumors 68030

    yusukeaoki

    Joined:
    Mar 22, 2011
    Location:
    Tokyo, Japan
    #3
    Awesome! Thank you!!
    I have a 2.2GHz so I guess it supports up to 1600MHz.
    Once again thank you!
     
  4. Neobond macrumors regular

    Joined:
    Feb 10, 2008
    Location:
    Minneapolis
    #4
    If you don't mind spending a little extra the 1600 HERE work with the new 2011 MBP

    EDIT

    or about $20 cheaper at Amazon
     
  5. MarocSpecops macrumors newbie

    MarocSpecops

    Joined:
    Aug 17, 2011
    #5
    go for it ! But for all people, it isn't worth to upgrade from 1333 to 1666. Performance difference is less then 0.1 %
     
  6. Pyre1582 macrumors newbie

    Joined:
    Aug 3, 2011
    #6
    I have the Kingston Hyper X memory, 8GB 1600MHz. Used it for a while and there hasn't been any problems.

    And yeah, you can't tell the difference between 1600MHz and 1333MHz unless you're gaming, which you get a minor improvement of 5-8FPS (In my experience at least).
     
  7. MarocSpecops macrumors newbie

    MarocSpecops

    Joined:
    Aug 17, 2011
    #7
    5 - 8 fps ? Thats a big improvement ! I'd bet my life with the 1333 mhz u would get the same FPS (maybe 2 @ max fps less !)

    But hey, there are still miracles in the world (fall of Faraoh Mubarak for example)
     
  8. getheo macrumors member

    getheo

    Joined:
    Jul 3, 2011
    #8
  9. Inconsequential macrumors 68000

    Joined:
    Sep 12, 2007
    #9
    I'd be very impressed if you suddenly managed to get 1 more FPS let alone 5-8.

    I suspect if what you are saying is true then more than just increase in memory speed is the cause.

    Put it this way, when I was over clocking hardware, memory speed made sod all difference to games FPS!
     
  10. Fat Fatster macrumors newbie

    Joined:
    Sep 3, 2010
    #10
    Definitely swap up to 1600 speed ram

    Hey guys,

    (1) I have a very late 17" macbook Pro. (It is actually the somewhat rare 2.5 quad model.) One of the very last ones made.

    (2) It comes with 1333 ram

    (3) I swapped in 1600 ram

    (4) IT IS ABSOLUTELY CERTAIN, THAT, THE MACHINE RUNS MUCH, MUCH, MUCH, MUCH, MUCH FASTER when you have 1600 speed ram.

    (Indeed, it runs 1600 / 1333 = 1.20x faster on all memory operations - it's just that simple and obvious.)

    I did many tests back-and-fore swapping the slow and fast ram, and it is very, very obvious, the speed difference. Most operations on computers are just memory bound - everything from startup to rendering and the like is quicker - obviously and clearly quicker - with faster ram.

    (5) I have had utterly no problems running the faster ram. It reports and runs the ram utterly normally, no problem.

    (6) These machines cost thousands, and ram cost a few dollars - there seems very little reason you wouldn't do this.

    (7) I do have one of the very last 17" mbp. (It was "old new stock" - I bought it unused in March 2013.) So, it's possible that OLDER 17" mbp will not run 1600 speed RAM. But, I mean it costs like $100 to try, on a fantastic machine worth $1000s, so it's a huge win at low cost if it works.

    I hope this helps future readers!!! Cheers
     
  11. slvrscoobie macrumors 6502a

    slvrscoobie

    Joined:
    Mar 24, 2013
    Location:
    NJ
    #11
    MUCH MUCH isnt very scientific, or quantitative. Mind giving me a metric to go by?

    I just installed 1333 CAS 9 8Gbx2.
    Wondering if its worth reselling the ram, and buying more 1600 CAS 9 ram

    I have a cruical M4 SSD for boot, so even if its a few percentage points, it might be worth spending the extra 15-20 bucks to swap for the better ram.
    course, the cumulative time I've spent looking into it, is probably more than any amount of time I'll save in editing photos with faster ram :lol:
     
  12. yusukeaoki thread starter macrumors 68030

    yusukeaoki

    Joined:
    Mar 22, 2011
    Location:
    Tokyo, Japan
    #12
    Depends on what you do.
    The 1333 to 1600 upgrade isnt as visible unless you run benchmarks.
     
  13. The Mercurian, Aug 17, 2013
    Last edited: Aug 17, 2013

    The Mercurian macrumors 65816

    Joined:
    Mar 17, 2012
    #13
    Thinking about doing this upgrade myself right now.

    I have 16GB 1333MHz in a 2011 15" MBP 2.5GHz with an SSD - it is a beast of a machine already pretty much - but I do heavy duty statistics - I run models that take many hours to run. This is not good for productivity in that I make a change in the code and have to wait 5 hours to find out what difference it makes.

    Lately I'm wondering if I swapped out the 1333MHz RAM for 1600MHz RAM would I notice much of a difference for this kind of work ?
     
  14. vpro macrumors 65816

    vpro

    Joined:
    Jun 8, 2012
    #14
    Awomen



    I feel you! I have one of the last 2.5Ghz 17" MonsterBook PRO too and have upgraded her to the ultra-max, she is cool and blazing fast for sure compared to my 15"rTOYBOOK.
     
  15. yusukeaoki thread starter macrumors 68030

    yusukeaoki

    Joined:
    Mar 22, 2011
    Location:
    Tokyo, Japan
    #15
    It wont hurt to do so.
    But Im not too sure on what you are going to be doing?
    I run my MBP almost 15~20hours a day and both 1333 and 1600MHz memory didnt show much difference.
    Photoshop might be a little faster than the 1333 model.

    Honestly the number doesnt change unless you run benchmark.
    If you were told to use the 2 identical computers with different RAM speeds, you wont be able to tell with your eye.
     
  16. The Mercurian macrumors 65816

    Joined:
    Mar 17, 2012
    #16
    Ha it will make a difference to my bank balance! Checking prices and I don't like what I see so I think I'll leave it.

    Running a thing called OpenBugs - Bayesian statistics tool. You set up a model and it throws random numbers at it for hundreds of thousands of simulations - it takes hours. Very processor and RAM intensive. I figure slightly faster RAM would actually speed up this process. But seeing the prices I don't think it's worth it
     
  17. yusukeaoki thread starter macrumors 68030

    yusukeaoki

    Joined:
    Mar 22, 2011
    Location:
    Tokyo, Japan
    #17
    Recently RAM prices shot up so it might be good to wait.
    About 5 months ago, 16GB 1333MHz were 80USD and 1600MHz model were 105USD.
    I dont know why it started to become so expensive...
     
  18. The Mercurian macrumors 65816

    Joined:
    Mar 17, 2012
    #18
    Thanks for the tip!!
    If I do upgrade it I will report back here if it makes any difference to my model building - the software automatically times each model anyhow, so I could run a before and after identical model on it :D
     

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