Class 2 MicroSDHC - Slow, but good enough?

Discussion in 'Acekard' started by montymintypie, Dec 14, 2009.

  1. montymintypie
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    montymintypie Advanced Member

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    I bought my MicroSDHC card (SanDisk 4GB) a loong time before I did my research... [​IMG] It's only a Class 2 card, which from what I've read seems pretty bad actually.

    I've read, however, that the Acekard (R.P.G,2,2i) can deal with this without a hitch, and still play games at full speed. How accurate is this statement? It'd suck if I had to buy another SD card...

    Also, here is the results from a speed test, using an expensive ($30) card reader.

    --------------------------------------------------
    CrystalDiskMark 2.2 Â 2007-2008 hiyohiyo
    Crystal Dew World : http://crystalmark.info/
    --------------------------------------------------

    Sequential Read : 19.001 MB/s
    Sequential Write : 6.988 MB/s
    Random Read 512KB : 18.755 MB/s
    Random Write 512KB : 1.310 MB/s
    Random Read 4KB : 3.518 MB/s
    Random Write 4KB : 0.014 MB/s

    Test Size : 50 MB

    Is this adequate?
     
  2. BowlOfSpiders

    BowlOfSpiders hi

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    I had a 4gb SDHC for a long time, I never experienced any slow down at all, except on one game, which I think is fixed now. So I think that card speed should be good.
     
  3. montymintypie
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    montymintypie Advanced Member

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    Were you sure your 4GB one was class 2? You can buy class 2,4 and 6 4GB cards. Although that's promising hearing that it works fine [​IMG]
     
  4. BowlOfSpiders

    BowlOfSpiders hi

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    I am positive it was a class 2. So you should be fine. [​IMG]
     
  5. montymintypie
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    montymintypie Advanced Member

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    Thanks, and Merry Christmas!
     
  6. DaMummy

    DaMummy GBAtemp Maniac

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    and who the hell buys a $30 card reader? but yea acekard can handle it
     
  7. Rayder

    Rayder Mostly lurking lately....

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    I have a 16gig Sandisk......it works fine and it's only labeled as Class 2, although when I bought it, the pic showed a Class 4 and that's what I thought I ordered. But I digress.

    My tests on that microSD were very positive and went far beyond the Class 2 spec......more like Class 12 by what the "class" rating is supposed to represent, which is sustained read/write speeds.

    My Sandisk 16GB Class 2 results:
    12MB/sec write
    19MB/sec read
    0.8ms response time

    I use two separate programs to test my microSD's with; HD Tach (read speed & response time) and ATTO Benchmark (read & write). Keep in mind that your readings could be limited to whatever card reader you may be using too.

    I don't think the "Class" of an SD means too much to be honest, especially on brand name SD's like Sandisk. Even the crappiest microSD I have (some generic no-name 2GB card that came with I-don't-remember-what) has better speed than what a Class 2 rating would suggest. Most SD's rate better than Class 6, even if they don't say that on the card. Class 6 is as high as they went with the "class" rating anyway. I don't think there are very many SD's made today that don't actually rate way over Class 6.

    It's my understanding that the response time tends to be more important than read/write speeds and I don't think response time has anything to do with the Class rating as far as I can tell. Response time is only important for a select few DS games anyway....Castlevania PoR was one.....if you're SD didn't have a 0.7ms response time or better, the game would lock-up a lot.

    Long story short, you own a Sandisk microSD, you're fine. No worries.
     
  8. montymintypie
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    montymintypie Advanced Member

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    Sweet! Also, the response time on mine is 1.1ms, which should be fine for what I'm using it for (no in game videos in any of the games I own).
     
  9. OSW

    OSW Wii King

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    Still, 2 bucks for an all in 1 at dealextreme lol.

    And back in the day, response time was more important than read/write speeds, however I don't know if flashcards have solved lag issues, or whether people have better microsd cards these days, but I haven't heard this kind of issue in yonks!!!

    I think its mostly due to better flashcard hardware...
     
  10. Leonidas

    Leonidas GBAtemp Fan

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    Class just represents the minimum write speeds the card is able to maintain. This is mostly meant for capture devices like cameras, camcorders, which need to maintain a certain data flow. What flash carts need most are good read speeds, and good response times. Although personally I put reliability above everything else, and so far Sandisk hasn't disappointed me.