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    Best SDHC or SDXC Cards? Benchmarks?

    Discussion in 'Accessories' started by moviemarketing, May 1, 2010.

  1. moviemarketing

    moviemarketing Milk Drinker

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    Any suggestions on the best SDHC or SDXC cards to buy?

    Today I bought a 32GB Kingston Class 4 SDHC card to use in my laptop. I'm interested in the 64GB Panasonic Class 10 SDXC card.

    Here are the results of my test of the Kingston:

    -----------------------------------------------------------------------
    CrystalDiskMark 3.0 x64 (C) 2007-2010 hiyohiyo
    Crystal Dew World : Crystal Dew World
    -----------------------------------------------------------------------
    * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

    Sequential Read : 18.946 MB/s
    Sequential Write : 10.280 MB/s
    Random Read 512KB : 18.571 MB/s
    Random Write 512KB : 2.063 MB/s
    Random Read 4KB (QD=1) : 2.975 MB/s [ 726.3 IOPS]
    Random Write 4KB (QD=1) : 0.017 MB/s [ 4.2 IOPS]
    Random Read 4KB (QD=32) : 3.200 MB/s [ 781.4 IOPS]
    Random Write 4KB (QD=32) : 0.019 MB/s [ 4.6 IOPS]

    Test : 1000 MB [H: 0.0% (0.0/30.1 GB)] (x5)
    Date : 2010/05/01 18:28:59
    OS : Windows 7 Home Premium Edition [6.1 Build 7600] (x64)
     
    moviemarketing, May 1, 2010
    #1
  2. Pitabred

    Pitabred Linux geek con rat flail!

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    What exactly are you trying to do with them? All SD readers I'm aware of are attached to a laptop through the USB2 interface, so you won't see much better speeds than that (~20MB/s is the max real-world USB2 speed).

    If you're trying for a poor-man's SSD, don't. SD cards do not have the write longevity or wear leveling to handle that kind of usage, so you'll just end up with some very expensive plastic bits.
     
    Pitabred, May 2, 2010
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