Micro sdhc card classes

Discussion in 'NDS - Flashcarts and Accessories' started by Luis Sera, Jan 16, 2011.

  1. Luis Sera
    OP

    Luis Sera Newbie

    Newcomer
    9
    0
    Jan 10, 2011
    I have a dstwo on the way and im looking for a memory card. I have been looking at some 16gb micro sdhc cards when I came across what class it was
    * Class 0 cards do not specify performance, which includes all legacy cards prior to class specifications.
    * Class 2, 2 MB/s, slowest for SDHC cards.
    * Class 4, 4 MB/s.
    * Class 6, 6 MB/s.
    * Class 10, 10 MB/s.
    The class system is simple to understand, with those speeds being minimums. What I dont know, is whether it would affect performance on the dstwo supercard. I mean games might be ok depending on the game but surely this wouldnt make much difference to get a class 2 as opposed to a class 10 for example.
     
  2. DeMoN

    DeMoN GBAtemp Guru

    Member
    7,651
    102
    May 12, 2004
    United States
    Class usually does not make a difference with performance, only read speed (or random access time) does. Some microSDs have such slow read speeds that they can't run certain games without freezing. Class determines the write speed of the card, which is how long it takes to transfer stuff from your PC to the microSD. The DSTwo has many unique features that may work faster with a higher write speed (such as real-time save/load and real time cheat or whatever), but again, it won't make that much of a difference.
    However, a general rule of thumb is that a higher class card = higher quality = faster read speed as well. This is not always the case though.

    The only way to test a microSD's read speed is to buy it then use a program on it. Each microSD is unique, but you should be able search around these forums to find what are the best microSDs.
     
  3. Evo.lve

    Evo.lve All that you could be.

    Member
    1,786
    21
    Oct 11, 2010
    Away from you.
    Class 6 Transcend and A-Data cards are known good brands.
     
  4. zizer

    zizer GBAtemp Addict

    Member
    2,035
    4
    Aug 23, 2010
  5. Mbmax

    Mbmax Homebrew addicted

    Member
    2,274
    47
    Nov 7, 2006
    This link is useless. The best way to test a microSD is not on the PC but on the flashcart itself.
    There is some tools for that : Checkdisk from moonshell 2.10, speed tester for libfat, TESTSD (require a supercard dsone with old OS).

    Now about some reliable brand. The only one not faked for now is samsung. Those microSD are grey and glossy black on the golden traces side.
    They got a good access time to data and are ok in clean mode, special mode and AAP mode.

    [​IMG]
     
  6. Luis Sera
    OP

    Luis Sera Newbie

    Newcomer
    9
    0
    Jan 10, 2011
  7. Luis Sera
    OP

    Luis Sera Newbie

    Newcomer
    9
    0
    Jan 10, 2011
  8. zizer

    zizer GBAtemp Addict

    Member
    2,035
    4
    Aug 23, 2010
    are you not working in samsung? lol
     
  9. nesdude0011

    nesdude0011 Member

    Newcomer
    44
    0
    Jan 7, 2011
    United States
    I'm pretty much in the same boat you are. I have a DStwo coming in the mail from zeroshipping, and I want to pick up a nice micro sdhc that will work properly with it. I would prefer to go with either Sandisk or Kingston, as they are the cards I have had in the past, and have never had any problems with either. They are however the most expensive, and cost quite a bit if you want class 6 or better.

    A-Data and Patriot sell for MUCH less, but how do they match up?
     
  10. Luis Sera
    OP

    Luis Sera Newbie

    Newcomer
    9
    0
    Jan 10, 2011
    Unless there is a compatibility issue, im going with the lexar. They are a reputable brand, never heard of patriot. Can someone confirm that?
     
  11. GreatCrippler

    GreatCrippler Greatness Fallen

    Member
    1,298
    171
    Mar 27, 2010
    United States
    I have had a lot of issues with Lexar cards. The only brand I have had success with across the board is Transcend. I have a Class 6 "8" gig, and have also used a class 4 "4" Gig, as well as an SD "2" gig. All have had well above average read speeds. You can get an "8" Gig class 6 for less than $20 shipped.
     
  12. Evo.lve

    Evo.lve All that you could be.

    Member
    1,786
    21
    Oct 11, 2010
    Away from you.
    When you buy micro SD cards for flashcarts, it's a lot more difficult than you think.

    People who have only ever heard of the term R4 would beg to differ, to them it's "Oh simple you put the little card in the DS card and play your games".

    Nothing could be further from the truth.

    A good micro SD for a flashcart has a low latency, ideally under 8254 (pretty much redundant now, but it's nice to have peace of mind).

    The Class on an mSD refers directly to the write speed however a good write speed usually means a good read speed.

    The two main guidelines here are latency and class.

    Following these two guidelines, I can conclude that the best brands are Transcend and A-Data class 6 cards.
     
  13. nesdude0011

    nesdude0011 Member

    Newcomer
    44
    0
    Jan 7, 2011
    United States
  14. Evo.lve

    Evo.lve All that you could be.

    Member
    1,786
    21
    Oct 11, 2010
    Away from you.
    That's the one.
     
  15. Luis Sera
    OP

    Luis Sera Newbie

    Newcomer
    9
    0
    Jan 10, 2011
  16. nesdude0011

    nesdude0011 Member

    Newcomer
    44
    0
    Jan 7, 2011
    United States
    Thanks! Order placed. Now I'm just waiting for my DStwo to come in, and I'll be good to go!
     
  17. zizer

    zizer GBAtemp Addict

    Member
    2,035
    4
    Aug 23, 2010
    Class 4 is on the picture, class 6 is in the title description. lol