-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 18.866 MB/s
Sequential Write : 4.685 MB/s
Random Read 512KB : 18.903 MB/s
Random Write 512KB : 1.830 MB/s
Random Read 4KB (QD=1) : 4.637 MB/s [ 1132.1 IOPS]
Random Write 4KB (QD=1) : 0.533 MB/s [ 130.0 IOPS]
Random Read 4KB (QD=32) : 4.482 MB/s [ 1094.2 IOPS]
Random Write 4KB (QD=32) : 0.493 MB/s [ 120.4 IOPS]
Test : 50 MB [I: 20.5% (6.1/29.9 GB)] (x5)
Date : 2012/01/04 22:14:02
OS : Windows 7 Home Basic Edition SP1 [6.1 Build 7601] (x64)
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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 : 19.476 MB/s
Sequential Write : 8.280 MB/s
Random Read 512KB : 18.758 MB/s
Random Write 512KB : 3.897 MB/s
Random Read 4KB (QD=1) : 4.307 MB/s [ 1051.4 IOPS]
Random Write 4KB (QD=1) : 0.658 MB/s [ 160.7 IOPS]
Random Read 4KB (QD=32) : 4.475 MB/s [ 1092.5 IOPS]
Random Write 4KB (QD=32) : 0.692 MB/s [ 168.9 IOPS]
Test : 50 MB [H: 49.4% (2819.5/5708.4 MB)] (x5)
Date : 2012/01/04 22:18:41
OS : Windows 7 Home Basic Edition SP1 [6.1 Build 7601] (x64)
-----------------------------------------------------------------------
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 : 23.638 MB/s
Sequential Write : 12.255 MB/s
Random Read 512KB : 23.199 MB/s
Random Write 512KB : 11.920 MB/s
Random Read 4KB (QD=1) : 7.305 MB/s [ 1783.4 IOPS]
Random Write 4KB (QD=1) : 1.250 MB/s [ 305.1 IOPS]
Random Read 4KB (QD=32) : 7.799 MB/s [ 1904.0 IOPS]
Random Write 4KB (QD=32) : 1.267 MB/s [ 309.4 IOPS]
Test : 100 MB [F: 34.0% (9.9/29.2 GB)] (x3)
Date : 2012/01/04 20:15:34
OS : Windows 7 SP1 [6.1 Build 7601] (x64)
Samsung 32GB Class 10 via SD adapter.
-----------------------------------------------------------------------
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 : 18.873 MB/s
Sequential Write : 9.801 MB/s
Random Read 512KB : 21.474 MB/s
Random Write 512KB : 10.420 MB/s
Random Read 4KB (QD=1) : 1.990 MB/s [ 485.9 IOPS]
Random Write 4KB (QD=1) : 2.010 MB/s [ 490.6 IOPS]
Random Read 4KB (QD=32) : 1.979 MB/s [ 483.2 IOPS]
Random Write 4KB (QD=32) : 2.028 MB/s [ 495.1 IOPS]
Test : 100 MB [G: 34.0% (9.9/29.2 GB)] (x3)
Date : 2012/01/04 20:39:56
OS : Windows 7 SP1 [6.1 Build 7601] (x64)
Samsung 32GB Class 10 via USB cable.
-----------------------------------------------------------------------
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 : 18.017 MB/s
Sequential Write : 12.492 MB/s
Random Read 512KB : 17.762 MB/s
Random Write 512KB : 1.441 MB/s
Random Read 4KB (QD=1) : 2.924 MB/s [ 713.8 IOPS]
Random Write 4KB (QD=1) : 0.013 MB/s [ 3.3 IOPS]
Random Read 4KB (QD=32) : 3.542 MB/s [ 864.8 IOPS]
Random Write 4KB (QD=32) : 0.014 MB/s [ 3.3 IOPS]
Test : 50 MB [D: 4.3% (1.3/29.8 GB)] (x5)
Date : 2012/01/05 19:18:40
OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)
PNY 32GB Micro SD Card Class 10
Thanks for the info and handy tools. It will be interesting to see what happens with Android and SDXC cards, since they require the proprietary exFAT. So for cards 64Gb and above we may run into problems with some phones/roms.
idk about those 32gb micro sd card.. but i was wondering if how is the best class, is it 10? or lowest value of class is the best quality sd card? because i'm planning to buy one. thanks!
List Price: $88.99Just to summarize for those who are looking (like I was):
Samsung 32GB Class 10
Random Write 512KB : 11.920 MB/s
Random Write 4KB (QD=1) : 1.250 MB/s [ 305.1 IOPS]
Random Write 4KB (QD=32) : 1.267 MB/s [ 309.4 IOPS]
I've put just the write speeds, since this is the bottle neck.
List Price: $88.99
Price: $79.95
Holy ... :O Reading/Writing speed very good but price is really bad. If you add 150 Dolar this price you can buy a new low-end android phone
You're lucky. In Brazil I've paid US$ 65 for a SanDisk 32gb class 4.Well that is indeed expensive, but that card costed me only 40 dollar in Holland.
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.
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]
Thank you for information .
I dont like it , its sucks that higher class is not better in all ways.
But then, why people here in xda keep saying that class4 is better than class6/10 in using applications, you say that it depends on random read speed. We see that random read speed is higher in class6
class6
Random Read 4KB (QD=1) : 5.356 MB/s [ 1307.5 IOPS]
Random Read 4KB (QD=32) : 5.484 MB/s [ 1338.8 IOPS]
vs.
class4
Random Read 4KB (QD=1) : 3.234 MB/s [ 789.5 IOPS]
Random Read 4KB (QD=32) : 3.164 MB/s [ 772.4 IOPS]
How about android phones. Do they rely more on random than sequential?