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
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.
Click to expand...
Click to collapse
( 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/Product.aspx?Item=N82E16820220547
amazon user reviews
http://www.amazon.com/Lexar-MicroSD...dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1
xda discussion about various class of cards
http://forum.xda-developers.com/showpost.php?p=13161740&postcount=26
riahc3 said:
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]
Click to expand...
Click to collapse
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-replies.cfm?t=1582172
I am pasting the info from that thread here
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____________________________________________________________________
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/showpost.php?p=15704916&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/showpost.php?p=16472035&postcount=65
from user freeze888
http://forum.xda-developers.com/showthread.php?p=15269669
from user Shudushi
View attachment 656461 View attachment 656462
From user cajunflavoredbob
http://forum.xda-developers.com/showpost.php?p=15713401&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/showpost.php?p=15700083&postcount=20
http://twitpic.com/5q0ryp
Test report for other class of cards
1. Thanks to vicedens2002
http://forum.xda-developers.com/showpost.php?p=15700162&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/kingmax-intros-worlds-first-64gb-microsd-card-20110526/
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/showpost.php?p=15913944&postcount=45
Samsung has recently announced a 32gb class10 card.
The specs for speed looks very nice
http://www.engadget.com/2011/06/30/samsung-announces-32gb-microsd-card-capable-of-12mbps-write-spee/
I just pass by
wow good job dude
I'll get a 32gb Sandisk class 4
Can it with with htcdesire
Sent from my HTC Desire using XDA Premium App
good post thankyou
Nayfuslis said:
Can it with with htcdesire
Sent from my HTC Desire using XDA Premium App
Click to expand...
Click to collapse
I think most of the phones now available inthe market is compatible with microsdhc cards
thanks for these helping post. using an 32gb sandisk card so long with my sgs.
Thanks for the useful info.
thx for the info
greate work!
I bought a brand with a humming bird, is it one of the brand you mentioned?
A-data 32 GB MicroSDHC class 10
test result http://twitpic.com/5q0ryp
I will go with the 32gb class 4
Many thanks for this useful thread...
jesus_c said:
A-data 32 GB MicroSDHC class 10
test result http://twitpic.com/5q0ryp
Click to expand...
Click to collapse
Great speeds.
Will add that to first post
It would be great if u could do a detailed test with crystalmark application.
very useful
Patriot LX Micro SDHC 8GB Class 10 (PSF8GMCSDHC1)
tested on Windows Vista SP2 x86
Code:
--------------------------------------------------
CrystalDiskMark 2.2 (C) 2007-2008 hiyohiyo
Crystal Dew World : http://crystalmark.info/
--------------------------------------------------
Sequential Read : 16.772 MB/s
Sequential Write : 9.199 MB/s
Random Read 512KB : 16.726 MB/s
Random Write 512KB : 0.941 MB/s
Random Read 4KB : 3.217 MB/s
Random Write 4KB : 0.008 MB/s
Test Size : 100 MB
Date : 2011/07/03 15:13:46
I see the 32GB version is much faster in random acesses. Just for the record - the 8GB version sucks
drgopoos said:
Great speeds.
Will add that to first post
It would be great if u could do a detailed test with crystalmark application.
Click to expand...
Click to collapse
A-DATA MicroSDHC 32GB class 10 [AUSDH32GCL10-RM3BKBL]
tested on my old netbook lenovo s10-2 with windows 7 x86 sp1 2GB RAM
used a-data microsd-usb2.0 adapter
second test in my phone with sdcardspeedfix (2048KB)
Related
Yeah. So obviously other benchmarks for MicroSDHC cards on other phones won't be suitable due to hardware differences. The speed also can't be based on the cards class either, because again there are hardware differences and card manufacture quality differences. So I'm going to start by posting my card and results with SD Card Speed Tester from the market. I thought it would better to test the card on the phone itself, as that's where we will be using the phone the most.
I have not rooted or altered my Evo software in any way, if it matters.
Hardware revision 003.
Sofware 3.29.651.5
My card is a Kingston 4GB Class 4 MicroSDHC Model SDC4/4GB Amazon
SD Card Speed Tester Results 6 Tests(1-3MB Buffer) 2 each buffer size.:
1MB buffer:
Test 1: ------
Write 4MB/s
Read 10MB/s
Test 2: ------
Write 5MB/s
Read 10MB/s
2MB buffer:
Test 1: -----
Write 5MB/s
Read 10MB/s
Test 2: -----
Write 5MB/s
Read 10MB/s
3MB buffer:
Test 1: -----
Write 4MB/s
Read 10MB/s
Test 2:-----
Write 5MB/s
Read 11MB/s
Consistent speeds, but I want faster. Post your card model and results with SD Card Speed Tester app on the Evo 4G.
weehooherod said:
KOMPUTERBAY 16gb Class 6 Card
Write: 7 MB/s consistent
Read: 11 MB/s consistent
Testing with "h2testw" on my computer through a micro sd to sd adapter.
Only $47 with shipping too!
http://www.amazon.com/KOMPUTERBAY-m...dapter/dp/B003O996G8/ref=cm_cr_pr_product_top
Edit: Just tested with the SD Card Speed Test app on my Evo and got 4 MB/s Write and 13 MB/s Read. I don't trust that app though because there are too many factors affecting the results. I ALWAYS get higher scores right after a reboot, on airplane mode, all apps killed, super overclocked. Testing from a computer will give you more accurate results.
Click to expand...
Click to collapse
computer speed might also be a factor.
Try doing this test on difference computers if you can, I can test on 3 computers of varying speeds.
Just got a new card and did some read speed tests in HD Tune:
Sandisk, SD, Class 4
Read: Min 8.3 / Max 15.2 / Av 15.2 MB/s
Sandisk, microSD, Class 4
Read: Min 4.8 / Max 7.6 / Av 7.1 MB/s
Samsung, microSD, Class 6
Read: Min 7.8 / Max 15.1 / Av 14.6 MB/s
Hey gang,
This was a post from n2locarz that I found interesting and I wanted to post it in this forum
I personally have no education on the subject.
Talk amongst yourselves :fingers-crossed:
n2locarz said:
Hey guys, found this interesting article on slashdot about the "lag" of Android ICS. Looks like it may be a bigger issue than just our Inc2s. Anyway, read it over.
http://news.slashdot.org/story/13/01/12/1332204/the-android-lag-fix-that-really-wasnt
There is one comment I found very interesting. They are talking about faster "class 10" sd cards being better, which may not be the case:
This is a common misconception. The class of the SD card is a rating for sequential write speed, nothing more. It's important for cameras and camcorders - in fact it was developed for camcorders because some memory cards simply couldn't write the video data as quickly as the device was sending it to the card.
For an Android device you're more interested in its 4k random read/write performance. It's basically a computer reading/writing lots of small files, so it'll be most impacted by 4k read/write speeds.
As it turns out, manufacturers can tune a flash card for a certain type of performance. If you tune it for faster sequential speeds, random speeds suffer. Likewise if you tune it for random speed, sequential speeds suffer. The class 10 cards I've benchmarked typically hit 10-20 MB/s on sequential writes, but will bog down to as slow as 0.004 MB/s on random writes (yes, 4 kB/s - it was the card I bought before I learned all this. It took 4 hours to copy 4 GB of sheet music and MP3s to that class 10 card - a blissful 0.28 MB/s). Here are the CrystalDiskMark scores I got for a 32 GB class 4 card I have:
seq: 22.9 MB/s read, 4.3 MB/s write
512k: 22.0 MB/s read, 1.3 MB/s write
4k: 3.3 MB/s read, 1.3 MB/s write
Yikes! Only 4.3 MB/s write speed. Who would ever want that? Well look at the benchmarks for a 16 GB class 10 card I have:
seq: 21.8 MB/s read, 12.0 MB/s write
512k: 21.5 MB/s read, 0.9 MB/s write
4k: 5.7 MB/s read, 0.008 MB/s write (not a typo)
So yeah it's 3x faster at sequential writes. But it's slower at 512k writes, and more than 160x slower at 4k writes. It's definitely a very bad choice for an Android device despite being class 10.
The sweet spot for Android is around class 4 or 6. That gets you good 4k write speeds without punishingly poor sequential write speeds (which are important if you're doing something like copying a movie to the card). That said, not all cards are created equal. The "class 2" Samsung card which came with my phone is hands down the best card I've tested overall. It peaked at 11 MB/s sequential writes (meaning it could've been rated class 10), while 4k random writes were still above 1 MB/s. Sandisk is another company which seems to underrate their cards (and their class 10 cards have better if not stellar 4k random write speeds), which is why they're usually highly recommended for Android devices.
tl;dr - You want a class 4 or 6 card, or a good class 2 card for your Android device. Not a class 10 card.
Click to expand...
Click to collapse
CalvinAMi said:
Hey gang,
This was a post from n2locarz that I found interesting and I wanted to post it in this forum
I personally have no education on the subject.
Talk amongst yourselves :fingers-crossed:
Click to expand...
Click to collapse
I don't have a class 10 and I still got the lag while using CM10. After 5+ times of getting it, wiping, and reflashing back to CM10 I finally gave up and am now back on Venom for the first time since ~1.0.
To the Community:
I use one of these puppies:
http://dx.com/p/sd-to-microsd-transflash-card-converter-module-27001#.UvLz3PldWSo
so I'm in the market for a 128gb SD card.
I've searched but cannot find the theoretical maxima for read / write speeds for the GN10.1-2014 and I don't wanna buy too much card for the hardware.
I'm contemplating the Lexar Pro or the SanDisk Extreme Plus.
Any recommendations?
Thanks in advance everybody...
SanDisk has proven to be reliable and fast SD card. At least for the 64GB model.
Sent from my SM-P605 using Tapatalk
whatllitbenext said:
To the Community:
I use one of these puppies:
http://dx.com/p/sd-to-microsd-transflash-card-converter-module-27001#.UvLz3PldWSo
so I'm in the market for a 128gb SD card.
I've searched but cannot find the theoretical maxima for read / write speeds for the GN10.1-2014 and I don't wanna buy too much card for the hardware.
I'm contemplating the Lexar Pro or the SanDisk Extreme Plus.
Any recommendations?
Thanks in advance everybody...
Click to expand...
Click to collapse
Hello whatllitbenext,
here are benchmark results for the internal flash memory. Taken from http://www.notebookcheck.com/Test-Samsung-Galaxy-Note-10-1-2014-Edition-Tablet.105624.0.html
AndroBench 3
Sequential Read 256KB
103.96 MB/s
Sequential Write 256KB
22.35 MB/s
Random Read 4KB
15.97 MB/s
Random Write 4KB
2.09 MB/s
best regards
Getrid …
Getrid said:
Hello whatllitbenext,
here are benchmark results for the internal flash memory. Taken from http://www.notebookcheck.com/Test-Samsung-Galaxy-Note-10-1-2014-Edition-Tablet.105624.0.html
AndroBench 3
Sequential Read 256KB
103.96 MB/s
Sequential Write 256KB
22.35 MB/s
Random Read 4KB
15.97 MB/s
Random Write 4KB
2.09 MB/s
best regards
Getrid …
Click to expand...
Click to collapse
Thanks Getrid.
What about to the external SD card? Is a 90mb/sec. read, 45 mb/sec. write SD card overkill?
whatllitbenext said:
Thanks Getrid.
What about to the external SD card? Is a 90mb/sec. read, 45 mb/sec. write SD card overkill?
Click to expand...
Click to collapse
Depends on how you want to use your tablet. If mainly for (HD) video recording/watching movies a fast card with high sequential r/w stats would be my first choice.
On the other hand, my experience from using my HTC HD2 with multiple OS booting from SD tells me, that sequential r/w speed doesn't matter when dealing with a lot of smaller data sizes, like from apps. In that case decent random r/w stats, (random) access time and also IOPS/sec come largely into effect - that is a class 10 card won't pay off and you should better watch out for a, for example, class 4 or 6 card from Sandisk.
You may also have a look at this very interesting thread:
http://forum.xda-developers.com/showthread.php?t=1947560
Kindest regards
Getrid …
Which on do you think is the best 32gb memory card!
Voted samsung pro (MB-MGBGB) for the excellent 4kb random r/w performance, as well as consistent 20mb/s+ over 512kb random and sequencial r/w
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 20.357 MB/s
Sequential Write : 19.612 MB/s
Random Read 512KB : 19.888 MB/s
Random Write 512KB : 19.296 MB/s
Random Read 4KB (QD=1) : 4.575 MB/s [ 1116.8 IOPS]
Random Write 4KB (QD=1) : 1.847 MB/s [ 451.0 IOPS]
Random Read 4KB (QD=32) : 4.991 MB/s [ 1218.5 IOPS]
Random Write 4KB (QD=32) : 1.956 MB/s [ 477.5 IOPS]
Test : 100 MB [H: 0.0% (0.0/29.8 GB)] (x5)
Date : 2014/01/09 16:07:47
OS : Windows 8.1 Pro N [6.3 Build 9600] (x64)
My 32 GB Kingston suddenly died after 1 year and 3 days.
But with their 10 year guarantee I got a new one.
Luckly I did not have any important files on it.
I've never had an issue with Sandisk.
Sure
No question... san
San Disk will be the best one, I'm using one
Currently using a Kingston SDC4/32, so a class 4 SDHC. Its worked flawlessly so far in right under a year. I never really migrated apps to it and ran them from it.
https://www.sdcard.org/developers/overview/speed_class/
In case you were curious about SD card speeds as the metric for "best"
Here is another explanation that may help you.
http://www.whatdigitalcamera.com/equipment/advice/517064/understanding-memory-cards.html
Right now though SanDisk purportedly has the fastest memory card in the world, so if speed is your aim and price isn't of concern, there you go (unless your device couldn't keep up)
Definitely SanDisk class 10
Sent from my GT-I9500