Accessories class 6 memory card

Discussion in 'Android Devices' started by gurmukhp, Aug 18, 2010.

  1. gurmukhp

    gurmukhp Active Member
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    Jul 12, 2010
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    Hi there,

    I have a class 6 sandisk card in my desire but am wondering if it is actually as fast as it should be. Videos are laggy amongst other things.

    I have downloaded a SD card speed test from the market. The results were 13mb/s to write(quite good I thought) but the read speed was only 5mbps/s.

    Anyone know if those values are expected?

    Thx!
     

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  2. KlaymenDK

    KlaymenDK Well-Known Member
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    Authoritative read speed ratings are hard to come by. Not even the SDcard organisation lists that information, and googling brings forth a number of different "theoretical" numbers (all of them non-authoritative).

    Sorry...
     
  3. KlaymenDK

    KlaymenDK Well-Known Member
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    The other day I bought a Kingston Class 4 card. I just came across this thread again, and figured I'd test my card (with SD Card Speed Test), which was rather disappointing!

    • Read: 3Mb/s
    • Write: 2Mb/s
    • Rating: Class 2
    Several runs (even with everything else shut down) confirm the result. WTF?! :thinking:
     
  4. gurmukhp

    gurmukhp Active Member
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    There could be many reasons. Is the Kingston card legit? You might be able to check that on their website using the serial number?
     
  5. KlaymenDK

    KlaymenDK Well-Known Member
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    It should be legit, I bought the card in a main street store with full packaging. Where do I find the serial number, and do you know where exactly on their site I can check that (or did you simply mean, contact their support)?
     
  6. Tunga

    Tunga Well-Known Member
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    Jul 14, 2010
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    I bought a class 6 Samsung, I get 5Mb read and 4Mb write.

    The lesson here is: buy a Sandisk.
     
  7. PsychoMania

    PsychoMania Active Member
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    Lancs, UK
  8. fried

    fried Well-Known Member
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    I've got a Transcend 8 GB class 6 card which I tested with the app mentioned above: -

    Read speed - 12 MB/s
    Write speed - 13 MB/s

    I wouldn't necessarily trust results from that app though. Try programs such as HD Tune or H2testw.
     
  9. KlaymenDK

    KlaymenDK Well-Known Member
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    All the shops around here sell unmarked Sandisk items, which on very close inspection are Class 2. I've not seen a single faster Sandisk item. (I prefer a real shop over paying a cheaper price on eBay but then 3x that amount on shipping.)

    Good point. Except, the only micro sdcard slot I own is in my Desire. :eek: I don't suppose mounting it via USB(2) is a very good idea for this type of testing, is it?

    Thought: I hope it's not the Desire (hardware/software) that's limiting the card! :thinking:
     
  10. nacatomi

    nacatomi Well-Known Member
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    Jun 22, 2010
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    In theory it should be the same all the built in card reader connect internally to the USB bus. So unless the desire is being a bottleneck the results should be very similar.
     
  11. KlaymenDK

    KlaymenDK Well-Known Member
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    All my tests confirm it: My card is not fast enough to earn the Class 4 rating printed on it. I hope the store will take it back. maybe I should (also) contact Kingston directly.
     

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  12. srhplover

    srhplover Well-Known Member
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  13. KlaymenDK

    KlaymenDK Well-Known Member
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    I used the complaint form at Kingston's web site the day before yesterday, and have yet to receive even an acknowledgement. :(

    I'm taking the card back to the shop this afternoon.
     
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