Haswell Macbook air with a slow SSD!

Discussion in 'MacBook Air' started by viespace, Sep 13, 2013.

  1. viespace macrumors newbie

    Aug 30, 2013
    Hi everyone, I just got my brand new mid-2013 13-inch Macbook air today, but when I test my disk speed with Blackmagic from the App store, it gives me a very low written speed(other people are showing around 700MB/S write?).
    Is this something that I can take my machine to the Apple store and demand a switch?
    Thanks for help!

    Attached Files:

  2. simsaladimbamba

    Nov 28, 2010
    You can always try, but you will hardly notice a difference between the 300 to 700 MB/s write speeds in normal daily usage, unless your normal daily usage depends on writing dozens of GBs to your SSD on a daily basis from a source, that offers those 700 MB/s or 500 MB/s.

    You could also try XBench and AJA System Test to see, if they show you the same results.
  3. viespace thread starter macrumors newbie

    Aug 30, 2013
    Thanks for the advice. I know I wouldn't notice the difference there, but it kind of makes me uncomfortable because one of the major features of the 2013 MBA is the big improvement of the disk speed. The speed that I have now is kind of the same as 2012 model.
    I will try the software out and post the result.


    The result is the same. :(
  4. robvas macrumors 68000

    Mar 29, 2009
  5. dollystereo macrumors 6502a


    Oct 6, 2004
    Indeed, this speed is really fast!
    Enjoy your mac, stop running benchmarks.
  6. viespace thread starter macrumors newbie

    Aug 30, 2013
    It is a low speed compare to 700mb/s. On WWDC, Apple mentioned clearly the ssd has a 40% performance increase than the previous version, but now I don't see that major increase.
    Are you suggesting that all 128GB SSDs have the same 300MB-ish write speed?


    Yes it is a very fast speed but this is not a impressive PCIe based SSD performance. I agree with you that I should enjoy my Mac, but it kind of bothers me having the idea that I might have a problem SSD.
  7. wressus macrumors member

    Nov 2, 2010
    Go back, return it and pay 200$ extra for the 256gb ssd and you will get 700mb/s write speed...
  8. Doublea6 macrumors regular


    Aug 3, 2013
    The 128 ssd gets around 300 like yours. The 256, and 512 get closer to 700. This is because they have more cells in the ssd resulting in better efficiency and then speed.
  9. BenTrovato macrumors 68000


    Jun 29, 2012
    The 40% was probably on the read speeds. As far as I knew, only the 256/512gb models were hitting the 700mb/s+ write speeds. The comments section in the link posted above gives a pretty good explanation as to why its faster on the higher capacity models.
  10. viespace thread starter macrumors newbie

    Aug 30, 2013
    Ok, if all 128ssds have the same performance, I am ok with the current speed. I just thought that all ssds have the identical speed.


    Thanks, that helps.


    I get it. Thanks for the comment.
  11. Weaselboy macrumors Core


    Jan 23, 2005
    2013 MBA 128GB owner here and I can confirm your speed is normal. The higher speeds you see reported by others are the 256GB models. This is common with all SSDs.
  12. scaredpoet macrumors 604


    Apr 6, 2007

    No they don't, just like not all hard drives have the same speeds. The 128GB SSD, aside from using a different vendor and different controller, has a different NAND density than the larger 256GB and 512GB models. This affects write speeds, but as you've seen, read speeds are unaffected.

    In real world usage, you're probably not going to see a disadvantage from this at all unless you're doing things that involve constantly writing massive amounts of data to the SSD. And constantly writing new data to an SSD is the surest way to kill it, so if that's your use-case, you definitely need to rethink your purchase or consider getting an external, conventional hard drive.

    Just take comfort in the fact that A. All 128GB SSDs on the 2013 Mac Air do this, and B. If running performance tests is all the work you have for your MacBook Air, then it's already a non issue really. :)
  13. Boyd01 macrumors 68000

    Feb 21, 2012
    New Jersey Pine Barrens
    I have been wondering about disk speeds myself so I just did this same test. I have a 2013 11" i7/8gb/512gb model. :)

    Attached Files:

    • disk.jpg
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  14. ItHurtsWhenIP macrumors 6502

    Aug 20, 2013
    Decided to try this out on my Samsung 256GB..not that I was worried, just curious I guess.

    Attached Files:

  15. Debian macrumors newbie

    Oct 15, 2013
    I have MBA 2013 13 inch model with 128GB SSD, 8GB RAM, i5.
    My friend bought 128GB SSD, with 4GB RAM, i5 and his SSD is much faster. I am getting like 250MB/s and his shows on BlackMagic 420MB/s (also tested on NovaBench). What a fail. IDK what to do, maybe return it? Hmm.. :mad:
  16. coldjeanzzz macrumors 6502a

    Nov 4, 2012
    The 128 SSD is always slower for write speeds

    On the 2012 MBA the 128 gets around 220 mb/s while the bigger SSDs are double that. The read speeds are the same though
  17. Debian macrumors newbie

    Oct 15, 2013
    But I don't know why are these speeds so different with the same model and specs.
  18. Weaselboy macrumors Core


    Jan 23, 2005
    Do you happen to have Filevault encryption turned on? That will slow your write speeds somewhat.
  19. Debian, Oct 26, 2013
    Last edited: Oct 26, 2013

    Debian macrumors newbie

    Oct 15, 2013
    No encryption turned on and no apps which can be slowing my disk running.
    Here is my SSD model number APPLE SSD SD0128F. So it's SanDisk - But why? I thought they use samsung SSD's.
  20. Weaselboy macrumors Core


    Jan 23, 2005
    Apple uses many different brands like Sandisk, Samsung, and Toshiba.
  21. Debian macrumors newbie

    Oct 15, 2013
    Everywhere when I read about SanDisk - they get same results. I am upset.
  22. NewbieCanada macrumors 68030

    Oct 9, 2007
    I have Filevault turned on and am getting 380-420 write speeds. But my drive is a Samsung.

    My 2012 rMBP is about 300 write and 450 read - so those who have a slower MBA can take comfort in knowing it's still faster than last year's rMBP at over twice the price.

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