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32GB microsd cards

OP drgopoos

1st July 2011, 11:12 PM   |  #1  
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Lots of threads and lots of info.
This is purely my review ( based on the info i got from many places) on the topic.


How to test your memory card - see post 2


Hope this helps somebody
I will be updating the thread as more info comes in from users.

My recommendation after playing with all sorts of microsd cards and speeds is to get a sandisk 32gb card ( the new sandisk cards do not show a class speed , except for their ultra and extreme cards - This is their new policy )

Why this recommendation

- Randrom read write is the most important for speed during normal phone performance and i have seen sandisk cards have it the highest .
HERE IS A POST FROM SOMEONE IN XDA. Forgot the source
Quote:

Class 2 and 4 cards have better random access speed and random read/write than class 6 or 10 cards in general. To get higher sequential write speeds, manufacturers sacrifice the random access speeds. That's just how it is.
The best all around card I've ever found is Sandisk class 4.
My 32gb Sandisk class 4 outperforms any other class 10 or 2 32gb card I've tested in the random access and random read/write speeds. That's what's most important when using with WP7 or Android when using it for apps or OS files that need to be accessed quickly. Class 6 and 10 cards are setup to initialize the area of the card that is about to be used to make the sequential write/read quicker, but it takes extra time in the beginning to do the initialization. If your using the card where you need to access small bits of info from various parts of card quickly, you will do best with class 2 or 4.
Most people seem to assume that the higher the class, the better the card is for everything, but that's not how it is. Different purposes need different kinds of speed... cards with higher sequential speeds have lower random speeds.

( quoted from one of the users in xda )

- Lexar class 10 ( I paid 94 $ for this :( ) has terrible random speeds. The worst infact. Some of the other class 10 cards like kingston, patriot, topram have higher random speeds. However failure rate of some of these cards ( except kingston is high)

- Sandisk 32gb is relatively cheaper and very reliable.

- However if you are interested in regular copying of large files , like for eg : daily trnasfer of lots of music and movie files it might be better to get a class 10 card.

here are some of the links where cards are discussed about

newegg user reviews
http://www.newegg.com/Product/Produc...82E16820220547


amazon user reviews
http://www.amazon.com/Lexar-MicroSDH...owViewpoints=1

xda discussion about various class of cards
http://forum.xda-developers.com/show...0&postcount=26

Quote:
Originally Posted by riahc3


I list I found of 32GB microSDHC cards:

Class 10
- Lexar 32GB High-Speed microSDHC Mobile (LSDMI32GBSBNAR)
- Patriot Signature 32GB Class 10 microSDHC Card (PSF32GMCSDHC10)
- Wintec FileMate Mobile Professional SDHC - Class 10 (3FMUSD32GBC10-R)
- TOPRAM 32GB Class 10 MicroSDHC Card (TRmicroSD32G_C10)

Class 6
- Komputerbay 32GB microSDHC Class 6

Class 4
- SanDisk MicroSDHC 32GB Class 4 Card (SDSDQM-032G-B35, SDSDQM-032G-B35A, SDSDQM-032G-B35N)
- Kingston 32GB microSDHC Flash Card (SDC4/32GB)
- Transcend 32GB microSDHC CARD Class 4 (TS32GUSDC4)
- Patriot Signature 32GB Class 4 (PSF32GMCSDHC43P)
- 3C Pro 32GB Class 4 microSDHC Card (3C_TF32G_C4)
- TOPRAM 32GB Class 4 microSDHC Card (TRmicroSD32G)

Class 2
- SanDisk microSDHC 32GB Card (SDSDQ-032G-A11M) [North American Version]
- SanDisk microSDHC 32GB Card (SDSDQ-032G-P36M) [Pacific Rim Version - should be the same as North America]
- SanDisk microSDHC 32GB Card (SDSDQ-032G-E11M) [related to MemoryVal?]
- Transcend 32GB microSDHC with SD Adapter (TS32GUSDHC2)
- Dane Elec 32GB microSDHC with SD Adaptor (DA-2IN1-32G-R)
- Duracell 32GB microSDHC with SD Adaptor (DU-2IN1-32G-R) [likely the same as the Dane Elec DA-2IN1-32G-R]

Editing to add more information

The link below is to the speed testing of many micro sd card. Very useful

http://forums.whirlpool.net.au/forum....cfm?t=1582172


I am pasting the info from that thread here




__________________________________________________ __________________

Some test results posted in this thread

__________________________________________________ __________________

Patriot 32gb class 10

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.282 MB/s
Sequential Write : 10.477 MB/s
Random Read 512KB : 19.071 MB/s
Random Write 512KB : 1.059 MB/s
Random Read 4KB (QD=1) : 7.335 MB/s [ 1790.7 IOPS]
Random Write 4KB (QD=1) : 0.247 MB/s [ 60.2 IOPS]
Random Read 4KB (QD=32) : 7.232 MB/s [ 1765.7 IOPS]
Random Write 4KB (QD=32) : 0.259 MB/s [ 63.2 IOPS]

Test : 100 MB [H: 47.0% (14.0/29.8 GB)] (x3) <All 0xFF, 1Fill>
Date : 2011/06/19 11:02:22
OS : Windows 7 Home Premium Edition [6.1 Build 7600] (x64)

-----------------------------------------------------------------------
Another test report for patriot class 10 card by user fyyzer
http://forum.xda-developers.com/show...6&postcount=22

-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.856 MB/s
Sequential Write : 17.332 MB/s
Random Read 512KB : 18.983 MB/s
Random Write 512KB : 0.724 MB/s
Random Read 4KB (QD=1) : 3.780 MB/s [ 922.9 IOPS]
Random Write 4KB (QD=1) : 0.006 MB/s [ 1.5 IOPS]
Random Read 4KB (QD=32) : 3.896 MB/s [ 951.2 IOPS]
Random Write 4KB (QD=32) : 0.006 MB/s [ 1.4 IOPS]

Test : 1000 MB [G: 5.8% (1.8/30.9 GB)] (x9)
Date : 2011/07/16 7:49:13
OS : Windows 7 SP1 [6.1 Build 7601] (x64)


__________________________________________________ __________________

__________________________________________________ __________________


SanDisk 8GB Class 6 for comparison, 2 years old.


-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 21.241 MB/s
Sequential Write : 17.626 MB/s
Random Read 512KB : 20.846 MB/s
Random Write 512KB : 4.629 MB/s
Random Read 4KB (QD=1) : 5.356 MB/s [ 1307.5 IOPS]
Random Write 4KB (QD=1) : 0.052 MB/s [ 12.7 IOPS]
Random Read 4KB (QD=32) : 5.484 MB/s [ 1338.8 IOPS]
Random Write 4KB (QD=32) : 0.058 MB/s [ 14.2 IOPS]

Test : 100 MB [H: 89.2% (6939.2/7782.5 MB)] (x3)
Date : 2011/06/19 0:47:33
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)

__________________________________________________ __________________
__________________________________________________ __________________



32GB Class 4 Sandisk.


Tested results when I received it today and thought I would post the results in case anyone else is considering purchasing from the same source.

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 20.071 MB/s
Sequential Write : 6.088 MB/s
Random Read 512KB : 19.716 MB/s
Random Write 512KB : 0.625 MB/s
Random Read 4KB (QD=1) : 3.234 MB/s [ 789.5 IOPS]
Random Write 4KB (QD=1) : 1.467 MB/s [ 358.2 IOPS]
Random Read 4KB (QD=32) : 3.164 MB/s [ 772.4 IOPS]
Random Write 4KB (QD=32) : 0.150 MB/s [ 36.5 IOPS]

Test : 1000 MB [E: 1.9% (0.6/29.7 GB)] (x5)
Date : 2011/06/27 19:34:44
OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)

29.71gb Capacity

SD Tools results:

writing speed 6.2mb/s
reading speed 21.7mb/s

More testing of sandisk 32gb class 4 card

http://forum.xda-developers.com/show...5&postcount=65
from user freeze888

http://forum.xda-developers.com/show...php?p=15269669
from user Shudushi

Attachment 656461 Attachment 656462

From user cajunflavoredbob
http://forum.xda-developers.com/show...1&postcount=25

[/QUOTE]


__________________________________________________ __________________
__________________________________________________ __________________

Just adding somemore info on some the cards i have










ADAta sd card Thanks to jesus_c
http://forum.xda-developers.com/show...3&postcount=20

http://twitpic.com/5q0ryp





Test report for other class of cards

1. Thanks to vicedens2002

http://forum.xda-developers.com/show...2&postcount=21

- Samsung 8GB class 6
- Sandisk 1GB
- Windows drive 60GB Class 3072 - OOps i wish I had this in my phone ;)


FINALLY 64GB CARD
http://www.geek.com/articles/mobile/...card-20110526/
Last edited by drgopoos; 9th August 2011 at 03:35 PM.
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1st July 2011, 11:15 PM   |  #2  
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How to test your memory card


1)Crystal bench mark for finding the random write speeds
2) H2testw 1.4 which tests to see if your card has genuine capacity
3) SD Formatter for SDHC This software formats all SD memory cards, SDHC memory cards

Thanks to user Szczepanik
http://forum.xda-developers.com/show...4&postcount=45



Samsung has recently announced a 32gb class10 card.
The specs for speed looks very nice

http://www.engadget.com/2011/06/30/s...ps-write-spee/
Last edited by drgopoos; 23rd July 2011 at 02:17 PM.
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5th July 2011, 03:59 AM   |  #3  
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I just pass by
5th July 2011, 04:47 PM   |  #4  
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wow good job dude
7th July 2011, 02:35 PM   |  #5  
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I'll get a 32gb Sandisk class 4
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7th July 2011, 03:03 PM   |  #6  
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Can it with with htcdesire

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10th July 2011, 05:59 AM   |  #7  
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good post thankyou
10th July 2011, 06:23 AM   |  #8  
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Quote:
Originally Posted by Nayfuslis

Can it with with htcdesire

Sent from my HTC Desire using XDA Premium App

I think most of the phones now available inthe market is compatible with microsdhc cards
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11th July 2011, 12:04 PM   |  #9  
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thanks for these helping post. using an 32gb sandisk card so long with my sgs.
11th July 2011, 03:51 PM   |  #10  
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Thanks for the useful info.

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