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  1. mrbears's Avatar
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       #1  
    Hi

    My Kingston card is 4GB class 4 SDHC card, and as I am in market for a new
    card, I was thinking about upgrading to class 6, which is supposed to be faster.
    Anyone actually saw difference in speed between Class 2, 4, and 6?
    (I am thinking about one from Transcend 4GB micro SDHC class 6 card for $26)
    http://www.amazon.com/exec/obidos/AS...bosnation0e-20
    Does anyone has experience with this particular card or brand?
    Any recommendation on which particular microSD card is good for Centro?
    Any good bargains?

    Any tip or advice would be greatly appreciated!
  2. #2  
    I think mine is a class 2. It works great. What benefit would there be to a faster one?
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  3. mrbears's Avatar
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       #3  
    Difference in class would result on difference of transfer speed.

    From Wiki:
    SDHC cards have SD Speed Class Ratings defined by the SD Association.
    The SD Speed Class Ratings specify the following minimum write speeds
    based on "the best fragmented state where no memory unit is occupied"

    * Class 2: 2 MB/s
    * Class 4: 4 MB/s
    * Class 6: 6 MB/s

    The only question is whether Centro is capable of reaping the benefit of Class 6.
    For non SDHC card, such as 2 GB cards, I am not sure what the transfer rate
    exactly is, but it is slower than SDHC card.
  4. #4  
    I got the Transcend from NewEgg for 19.99, it's a class 6 and I have no qualms with the transfer speed but it's the only micro card I have experience with so I have nothing to compare it to.
  5. #5  
    mrbears:

    I guess what I'm saying is, I see no reason to spend more money on a higher class card, if mine works fine. I guess my thinking is, either it is fast enough or it is not. For example, I don't want my music to play any faster.
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  6. mrbears's Avatar
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       #6  
    Tonylmiller, I agree that I wouldn't want my music to play any faster.
    On the other hand, I use Centro to watch a movie at times, and for movie size
    around 350 MB, it would take 15 min with Class 4 card. I wonder if it
    would be quicker if I use Class 6 card, and if so that would save me some
    significant time. (Assuming everything else works, it should take ~10 min)
    But if you never transfer files that large, I don't think you need to worry about
    speed ever.

    I always wondered what is the bottleneck process in writing files
    to micro SD using USB sync cable. When I transfer directly to the uSD card
    using computer's memory card port, it takes less than half the time. Why don't
    I take the card out of phone and directly download using computer's card
    reader if it is much faster? Well, I have a protective case on my phone and
    it is quite a workout to take it apart, open the battery door, and take out
    the microSD card everytime I want to save a movie.

    I tried to look up specs on Centro's data write speed using USB sync cable,
    but could not find right info. It may be entirely possible that even with
    Class 6 card, it may not make any difference since bottleneck in write
    speed may be elsewhere. I am hoping someone can give me better insight.
  7. agn727's Avatar
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    #7  
    I recently moved from a 700P to a Centro. I'm using a spare 2GB Kingston non-SDHC Class-less memory card. I've noticed when using the camera, my Centro experiences a gureling lag of between 5 and 10 seconds. My 700P never had this problem.

    I figured it was related to the memory card. So, now I have the camera set to save pictures to internal memory and everything is running snappily and without lag. Would a faster card prevent this bottleneck, or is the Centro just fitted with a slow card writer.
  8. #8  
    Higher class SDHC cards do have a better chance of not experiencing the "invisibility" phenomenon. Although the cause of the phenomenon is not really known, many think that slower transfer rates may be a cause.
  9. #9  
    Quote Originally Posted by mrbears View Post
    Tonylmiller, I agree that I wouldn't want my music to play any faster.
    On the other hand, I use Centro to watch a movie at times, and for movie size
    around 350 MB, it would take 15 min with Class 4 card. I wonder if it
    would be quicker if I use Class 6 card, and if so that would save me some
    significant time. (Assuming everything else works, it should take ~10 min)
    But if you never transfer files that large, I don't think you need to worry about
    speed ever.

    I always wondered what is the bottleneck process in writing files
    to micro SD using USB sync cable. When I transfer directly to the uSD card
    using computer's memory card port, it takes less than half the time. Why don't
    I take the card out of phone and directly download using computer's card
    reader if it is much faster? Well, I have a protective case on my phone and
    it is quite a workout to take it apart, open the battery door, and take out
    the microSD card everytime I want to save a movie.

    I tried to look up specs on Centro's data write speed using USB sync cable,
    but could not find right info. It may be entirely possible that even with
    Class 6 card, it may not make any difference since bottleneck in write
    speed may be elsewhere. I am hoping someone can give me better insight.
    If I want to transfer something large, such as a movie, I use a USB 2.0 card reader, and I think it takes less than a minute. But I don't do that very often. I backed up my whole Outlook email folder from work the other day. It was about 2 GB and it only took 2 minutes, as I recall. That seemed pretty fast to me. My buddy saw me doing it and he burned his Outlook folder to a DVD. I think it took him about 20 minutes.

    If it takes 15 minutes for you to transfer 350 MB, I don't think your card is the limitation. In other words, a faster card wouldn't make any difference.
    NiceGPSuperior1 is a free GPS program, now with the ability to save your map! Get more info here. It's free! If you like this app and want to encourage development, you can donate from the web page link.

    NiceDrudgeReader is a fast, simple reader for The Drudge Report. It is only $0.99, so check it out, too! More info here.

    Search for "Nice" in the app catalog to see all my apps.
  10. #10  
    What cards are everyone using that are HC and what class? I am getting a centro and I want to know what cards work well with it.
  11. #11  
    Mine is SanDisk.
    NiceGPSuperior1 is a free GPS program, now with the ability to save your map! Get more info here. It's free! If you like this app and want to encourage development, you can donate from the web page link.

    NiceDrudgeReader is a fast, simple reader for The Drudge Report. It is only $0.99, so check it out, too! More info here.

    Search for "Nice" in the app catalog to see all my apps.
  12. eTard's Avatar
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    #12  
    SDHC, class 4, 4gb, DaneElec.. works perfect for me on centro

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