512GB and 1TB SSD speed difference?

Discussion in 'iMac' started by Sid The Kid, Aug 6, 2017.

  1. Sid The Kid Suspended

    Joined:
    Jul 10, 2017
    #1
    Hello,

    An Apple Specialist on Live Chat told me that 512GB SSD and 1TB SSD have no difference in speed. Only on storage. Is it true?

    But I think 512GB is faster than 128GB. What about 256GB?

    But how can it be faster than another one?

    Thanks
     
  2. Glideslope macrumors 601

    Glideslope

    Joined:
    Dec 7, 2007
    Location:
    A quiet place in NY.
    #2
    IMO, in some instances the 512 is quicker, but only on a test. In real world, you won't notice. I have the 1TB in my 2017. It's 70% full. This is from today. It's roughly the same as the 512 test you'll see. Stress was set at 4g. :apple: DiskSpeedTest.png
     
  3. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #3
    Just for comparison ... here is my 2TB SSD in the 2017 iMac:

    iMac2017SSD.png
     
  4. jzuena macrumors 6502a

    jzuena

    Joined:
    Feb 21, 2007
    Location:
    Lexington, MA, USA
    #4
    The 512GB SSD in a 2017 iMac seems to be in the same ballpark as well.

    Screen Shot 2017-08-06 at 7.37.21 PM.png
     
  5. Fishrrman macrumors G5

    Fishrrman

    Joined:
    Feb 20, 2009
    #5
    Kid, you're not going to notice "the difference" in real-world applications... ;)
     
  6. kschendel macrumors 6502a

    Joined:
    Dec 9, 2014
    #6
    The small SSD's are slower in benchmark testing because of less internal parallelism, which is in turn due to fewer flash memory chips needed. Once you add enough flash chips to max out the number of streams that the particular SSD controller and board design allow, larger capacity doesn't run any faster. But that's mostly theory and benchmarking; in real life you would be hard pressed to detect the difference across sizes, even slowest to fastest.
     
  7. Sid The Kid thread starter Suspended

    Joined:
    Jul 10, 2017
    #7
    Fast :0
    --- Post Merged, Aug 7, 2017 ---
    Fast :0
    Fast :0
    --- Post Merged, Aug 7, 2017 ---
    Thank you for explaining.
    --- Post Merged, Aug 7, 2017 ---
    True :3
     

Share This Page