SSD Performance based on size?

Discussion in 'MacBook Pro' started by Nabby, Sep 8, 2011.

  1. Nabby macrumors regular

    Jul 10, 2008
    I'm looking at a new MBP and am thinking about getting an SSD in it. I'm curious to know if the performance is consistent across the SSD drives, regardless of size. i.e. Does a 128GB SSD perform as well as a 256GB SSD?


  2. DWBurke811 macrumors 6502a

    Jun 10, 2011
    Boca Raton, FL
    In theory, a larger drive will perform better than a smaller one if all else is equal. But how much is very dependent on what drive it is.
  3. reputationZed macrumors 65816

    Mar 9, 2011
    34°55′42″N 80°44′41″W (34.
    there is generally a performance falloff with the smaller SSd's ( 80 GB and smaller) as they typically use controllers with half the channels. Once you get over that gap I don't think size plays that big of a role.
  4. Nabby thread starter macrumors regular

    Jul 10, 2008
    Very interesting. Thanks for the information!

  5. AppleGoat macrumors 6502a

    Oct 14, 2010
    I may be wrong, but what I've noticed is that's there's greater write than read speed variance between small and large drives.
  6. vmachiel macrumors 68000

    Feb 15, 2011
    In the case of the agility 2 OCZ, the one that I have, the specs were as followed:

    40 GB:
    Max Read: up to 280 MB/s
    Max Write: up to 270 MB/s
    Sustained Write: up to 200 MB/s

    50-240 GB:
    Max Read: up to 285MB/s
    Max Write: up to 275MB/s
    Sustained Write: up to 250MB/s

    400-480 GB:
    Max Read: up to 250MB/s
    Max Write: up to 240MB/s
    Sustained Write: up to 200MB/s

    All models had: Random Write 4KB (Aligned): 10,000 IOPS
    So the middle size class preforms better.

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