2016 MBPs SSD Speed Difference!

Discussion in 'MacBook Pro' started by monkeydax, Nov 24, 2016.

  1. monkeydax, Nov 24, 2016
    Last edited: Nov 24, 2016

    monkeydax macrumors 6502

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    Nov 2, 2012
    #1
    Been looking around and realised there's quite a big difference between the 256GB SSD and 512GB read/write speeds?

    From my quick check:
    256GB 2300read/1300write
    512GB 5000read/2000write

    Can users confirm this?

    http://www.notebookcheck.net/Apple-MacBook-Pro-15-Late-2016-2-6-GHz-i7-Notebook-Review.185254.0.html

    This good review above shows some good details, and is whereI got that 512GB read/write speed from. Can base 256GB users and those who upgraded post their speeds here?

    Edit:
    I do suspect the 512GB read speed is a little excessive and abnormal there actually. Seems generally this is at about 2900.
     
  2. monkeydax thread starter macrumors 6502

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    #2
    Not sure if there's a difference between 15" and 13" too!
     
  3. sbpax macrumors member

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    Apr 29, 2016
    #3
    It's a known fact that larger SSDs are faster.
     
  4. fs454 macrumors 65816

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    Los Angeles / Boston
    #4
    Yep, the speed increase continues upward with the 1TB and 2TB models too. The 256GB will be the slowest, but it's still an absolute screamer.
     
  5. ccglows macrumors member

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    Nov 15, 2016
    #5
    Why is this?
     
  6. happyslayer macrumors 6502a

    happyslayer

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    #6
    How are you measuring? Black Magic Speed Test seems to max out at exactly 2000 MB/s for me?
     
  7. TazmoStarkana macrumors regular

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    Jun 12, 2016
    #7
    Just the way the SSD technology works.

    I just canceled my order for the 256 and upgraded to 512 because of this.
     
  8. PaulWog Suspended

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    Jun 28, 2011
    #8
    Yikes, if that's the case, I won't be considering the 256GB SSD.

    That yet again raises the price of the damned laptop. I don't need 512GB of storage, but I do want faster storage.
     
  9. monkeydax thread starter macrumors 6502

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    #9
    Can anyone confirm the 256GB is that much slower?
     
  10. ccglows macrumors member

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    Nov 15, 2016
    #10
    Currently using a 128 GB 2015 SSD and it's testing at 500 MB/s write and 1250 MB/s read. It has 13 GB left.
    I chose the 256 GB SSD and will be a bit disappointed if it's that much slower, though still a lot faster than my current!
     
  11. monkeydax thread starter macrumors 6502

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    #11
    Yeah it's making me wonder whether I should get the 512GB option.
     
  12. fs454 macrumors 65816

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    #12
    256GB is insanely little on a notebook of this caliber - you will not regret doubling it for the speed.
     
  13. protoxx macrumors 6502a

    protoxx

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    #13
    Double size, double cache/buffer.
     
  14. powerocool macrumors 6502

    powerocool

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    Jun 5, 2007
    #14
    That 512 SSD in AJA test seems to be wrong. It cannot be over 5000MB/s read speed.

    Here's my test on 1TB drive. I have 2x 1TB machines, they are similar. (note that I have FileVault turned on)
     

    Attached Files:

  15. TazmoStarkana macrumors regular

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    #15
    What about small files? Those are more realistic in day to day use
     
  16. monkeydax thread starter macrumors 6502

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    #16
    Yeah I suspect it's wrong too and Apple didn't even say they could go to that fast. Okay in any case I guess we're supposedly getting around 1400write on the 256 vs 1800write on the 512?
    --- Post Merged, Nov 24, 2016 ---
    Yeah I realised it gets a bit tight sometimes, but I work with a network attached storage as well as my portable hard drive if anything, and regularly, I have about 70GBs left on my mac, unless working on huge files which I don't keep for long locally, of course because I don't have that much room to begin with.

    You're right, probably will seriously consider getting the 512GB instead.
     
  17. ejl371 macrumors newbie

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    Nov 24, 2016
    #17
    To give you an actual answer, basically what happens is on a 128 gb drive there may be say 8 flash chips, all of which may be written to at one time (totally made up numbers). On A 256 gb drive there may be 16. On a 512 gb there may be 32 chips. The reason bigger drives are typically faster are because they spread the writes and reads out across more chips at the same time. This doesn't always keep scaling up because the 512 and the 1 TB or the 256 and 1 TB may have the same number, but denser chips. Hope that makes sense. This isn't a 100% accurate description of why, but it gives you a better idea than you may have had before.
     
  18. monkeydax thread starter macrumors 6502

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    #18
    Yep which is probably why the 1TB and 2TB may not be much faster. But i'm surprised the 256 is significantly slower than the 512?
     
  19. unagimiyagi macrumors 6502a

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    #19
    I'm told that the real world differences are negligible unless you're transferring files all day long. In other words, wouldn't even notice the faster SSD speeds. Not true?
     
  20. Ma2k5 macrumors 6502a

    Ma2k5

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    Dec 21, 2012
    #20
    Don't upgrade to 512gb. You won't notice the speed difference as the 256gb is disgustingly fast as it is. Only upgrade if you need storage, not for *potential* speed gain.
     
  21. deliriumxy macrumors member

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    Nov 21, 2016
    #21
    what is the difference in real world use? if I upgrade ram AND ssd --> might as well just buy the base 15"... and be broke for a while
     
  22. Brookzy macrumors 68040

    Brookzy

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    #22
    It isn't significantly slower. I have tested 256GB and 512GB MacBook Pro with Touch Bar. The reads were about the same; the writes were up-to 500MB/s faster on the 512GB. However, the 256GB is still the fastest storage device on the prosumer market. You would never know the difference in day-to-day use.

    Combined with the variation between models (Apple often dual-sources SSDs from SanDisk and Samsung; Samsung are faster) it makes the difference potentially even less.
     
  23. monkeydax thread starter macrumors 6502

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    #23
    Yeah probably you're right the noticeable difference would be small. 500MB is, however, a good 25-30% difference in speed. Seems pretty significant.
     
  24. Brookzy macrumors 68040

    Brookzy

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    #24
    But to write at, say 1800MB/s, you need a source that can provide data that fast - something the average user won't have. The fastest external SSDs on the market right now top up at about 850MB/s read for example. If you want to the 512, go for it by all means! But don't let the speed be the deciding factor because you will never notice it, and the reads are the same anyway (and, generally speaking, read speed is what makes the system "feel" fast).
     
  25. Yoshimura macrumors regular

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    #25

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