480gb OCZ VERTEX 3 SSD question about IOPS

Discussion in 'MacBook Pro' started by pedrofan, Apr 7, 2011.

  1. pedrofan, Apr 7, 2011
    Last edited: Apr 8, 2011

    pedrofan macrumors 6502

    Jun 9, 2008
    This is a copy/paste from OCZ's web page. According to this the 480gb OCZ vertex 3 model has less IOPS (in and out operations per second) than the smaller models. 40000 IOPS are less than the previous OCZ vertex 2 pro generation (50000 IOPS). So my question is if it is worth it to spend 1600$ on this model or getting the 480gb OWC that has been reuced to 900$ and has 30000 IOPS. And other questin is if this mistery of the IOPS is really noticeable.

    240GB Max Performance

    Max Read: up to 550MB/s
    Max Write: up to 520MB/s
    Random Write 4KB (Aligned): 60,000 IOPS

    480GB Max Performance

    Max Read: up to 530MB/s
    Max Write: up to 450MB/s
    Random Write 4KB (Aligned): 40,000 IOPS

    I think that 530mb/S are referred to compressed files and the 40000 iops are referred to non compressed files.

  2. mike2732 macrumors member

    Feb 22, 2011
    Max means nothing. You should look at constant read/write speeds/
  3. pedrofan thread starter macrumors 6502

    Jun 9, 2008
  4. MacBookPro.User macrumors newbie

    Apr 7, 2011
    I haven't found much information about the Vertex 3 480GB SSD. There is a little information on the OCZ website and OCZ forums but there aren't the benchmarks that are out for the 120GB and 240GB versions.

    I have the 240GB version but I'm also thinking about getting the 480GB if it performs better than the 240GB.
  5. pedrofan, Apr 8, 2011
    Last edited: Apr 8, 2011

    pedrofan thread starter macrumors 6502

    Jun 9, 2008
    It seems that 480gb model is slower than 240gb one, not only by the top speed peaks that are almost the same but slower, I'm concerned about by the IOPS, that seems to be much slower, even slower than vertex 2 series.

    VERTEX 3 - 240GB:......... 60,000 IOPS

    VERTEX 2 - 240GB:......... 50,000 IOPS

    VERTEX 3 - 480GB:......... 40,000 IOPS

    OWC 480GB:.................. 30,000 IOPS

    VERTEX 2 - 480GB:......... 15,000 IOPS

    But what are exactly the IOPS and which is their real impact on performance??
  6. Bigmacduck, Apr 8, 2011
    Last edited: Apr 8, 2011

    Bigmacduck macrumors regular

    Feb 15, 2009
    IOPS definition

    Read definition of IOPS (Input Output Operations per Second) here:


    A high IOPS specification is very key for server storage using databases with high transaction volumes or for multithreaded applications with high mass storage IO.

    An average workstation user, which the vast majority of MBP users are, does not feel the difference between 30'000 and 50'000 IOPS.

    And compared to the meager 180 IOPS of a 10k RPM SATA hard disk drive any SSD is is a big improvement. In fact the IT industry is moving from HDD to SSDs to improve the Disk IO performance of applications.

    Real commercial IT uses 'real expensive' SLC SSDs and not the cheap MLC technology we see in the consumer space. The difference between SLC and MLC is the drive life time (number of NAND Flash Cycles). A 512 GB MLC SSD in a large database server would reach the end of its lifetime in less than a month of usage.

    See also the following article that explains how IT is improving IOPS performance by moving from HDD to SSD:

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