Database Users

class 6 8gb benchmark results in WM, looking for some1 with a class 10 16gb for tests

I have searched these forums but haven't found any performance results in the OS so I tested my class 6 card (ridata 8gb) in pocket mechanic.
I would like to upgrade to a 16gb card but can't decide if it is worth to upgrade to a Kingston 16GB MicroSDHC 16GB Class 10 card. I am not sure if the HD2 can benefit from a class 10 card (for a faster Android). So if anyone has a class 10 card, can you test it using pocket mechanic here? It is free for 30 days.
I found these results on a french site but they seem quite ambitious.
Hardware perf index = 851.67
perf filesystem index = 2153
read test (unbuffered) = 282.7 x (41.41 MB / sec)
read test (buffered) = 519.6 x (76.11 MB / sec)
write test (unbuffered) = 4.4X (655.90 kb / sec)
write test (buffered) = 14.2x (2.07 MB / sec)
General filesystem test = 11.59 transactions / sec
Low level unbuffered read test = 89.8 x (13.15 MB / sec)
Low level buffered read test) = 427.1x (62.56 MB / sec)
attached are my results, low level tests didn't work for me. What does low level mean?

If i see that benchmark,a class 10 would not help you.
I also have a class 6 from sandisk,and it does a max of 18mb/s in windows.
I see that you get not 18mb/s in the device,so i think that a class 10 is not faster,atleast not in the device.
Just a theorie,i dont have a idea what the max writing/read speed are for the HD 2 himself?
Anyone?

My results
amilo123 said:
I have searched these forums but haven't found any performance results in the OS so I tested my class 6 card (ridata 8gb) in pocket mechanic.
I would like to upgrade to a 16gb card but can't decide if it is worth to upgrade to a Kingston 16GB MicroSDHC 16GB Class 10 card. I am not sure if the HD2 can benefit from a class 10 card (for a faster Android). So if anyone has a class 10 card, can you test it using pocket mechanic here? It is free for 30 days.
I found these results on a french site but they seem quite ambitious.
Hardware perf index = 851.67
perf filesystem index = 2153
read test (unbuffered) = 282.7 x (41.41 MB / sec)
read test (buffered) = 519.6 x (76.11 MB / sec)
write test (unbuffered) = 4.4X (655.90 kb / sec)
write test (buffered) = 14.2x (2.07 MB / sec)
General filesystem test = 11.59 transactions / sec
Low level unbuffered read test = 89.8 x (13.15 MB / sec)
Low level buffered read test) = 427.1x (62.56 MB / sec)
attached are my results, low level tests didn't work for me. What does low level mean?
Click to expand...
Click to collapse
I have a class 10 16gb.
Downloaded Pocket Mechanic 2.99.283, installed it in Winmo 1.66 fre, no extra apps.
Running Benchmark on my sdcard give me always an Winmo error, choose do not send to Microsoft, but let me continue tests. Here are results:
File system read test (unbuffered) 14.58 MB/sec
-----------"--------- (buffered) 18.50 MB/sec
-----------"--------- (unbuffered) 1.26 MB/sec
-----------"--------- (buffered) 6.88 MB/sec
File system general test 12.49 operations
Hope this help.

Hmz,so i will stay on my class 6 card.
Or some 1 with a class 10 that runs this test,and comes above 18mb/s

emottier said:
I have a class 10 16gb.
Downloaded Pocket Mechanic 2.99.283, installed it in Winmo 1.66 fre, no extra apps.
Running Benchmark on my sdcard give me always an Winmo error, choose do not send to Microsoft, but let me continue tests. Here are results:
File system read test (unbuffered) 14.58 MB/sec
-----------"--------- (buffered) 18.50 MB/sec
-----------"--------- (unbuffered) 1.26 MB/sec
-----------"--------- (buffered) 6.88 MB/sec
File system general test 12.49 operations
Hope this help.
Click to expand...
Click to collapse
thanks for the feedback, it seems the 50+ euros in price difference are not worth it, I will stick to a TeamGroup 16GB MicroSDHC Class 6

Class 10
amilo123 said:
thanks for the feedback, it seems the 50+ euros in price difference are not worth it, I will stick to a TeamGroup 16GB MicroSDHC Class 6
Click to expand...
Click to collapse
You're right, class 10 is expensive about 121.-Sfr, and not obviously more performant than a class 6.

I want my SD android to run faster, how?

Currently my SD card is a 16gb class 2. If I went out and purchased a class 10, would android boot and preform 5x faster? Is there another way to speed it up as well. Let me know, thanks!
Right now it takes about 2 minutes to boot android from windows 6.5 file explorer

ramdroid
Run a Ram version of android such as Darkstone SuperRam...?
would that work for you?
edit for link:
http://forum.xda-developers.com/showthread.php?t=870518

RyanRan said:
Currently my SD card is a 16gb class 2. If I went out and purchased a class 10, would android boot and preform 5x faster? Is there another way to speed it up as well. Let me know, thanks!
Right now it takes about 2 minutes to boot android from windows 6.5 file explorer
Click to expand...
Click to collapse
No, a class 10 will not make it perform any faster. Read speeds are about the same on class 2 as class 10. Class 10 just has faster sequential write speed... but the HD2 wouldn't take advantage of it anyways. No point in getting more than class 4 for hd2. Actually, class 2 and 4 cards generally will run android better than class 6 or 10, because higher class cards tend to have worse random access speeds than lower class cards.

And the speed depends on the android build u use as well.

guys are right here, stick to your current sd card, dont waste money on that 10 class card.

Rating. Read speed. Wright speed. Class type.
------------ (mbit/s)--------(mbit/s)
13× -------16.0---------------16---------------2
26× -------32.0 --------------32---------------4
40× -------48.0 --------------48---------------6
66× -------80.0 --------------80--------------10

I for one notice the difference in the speeds. Comparing the stock memory card and my class 10 the specs I posted state the difference. For some you may not notice. Video play back,data transfer,lag latency,music play back are just some things to look at to tell a difference. The card maker is also a depending factor. As far as build boot times a RAM version is the best. So in the end it boils down to the most for your dollar. Looking up prices compared to class type and size are all things to look at. Hope I helped shed some light.
Imho. There are many other things that you can do to speed up the build. It's all depending on your personal preference. Tbh.

jvillejoe said:
Rating. Read speed. Wright speed. Class type.
------------ (mbit/s)--------(mbit/s)
13× -------16.0---------------16---------------2
26× -------32.0 --------------32---------------4
40× -------48.0 --------------48---------------6
66× -------80.0 --------------80--------------10
Click to expand...
Click to collapse
The class is decided on write speed.... read speed has nothing to do with it. My class 4 Sandisk has a higher read speed than any class 10 card I've tested. Also, tweaks that card manufacturers do to increase the sequential write speed usually ends up lowering the random access speed, which will cause lag when running an OS off of it. High class cards are set up so they initialize and prepare the part of the chip that will be written or read from so that the sequential read/write speed is greatly increased, but this initialization takes a little extra time to do, so when you're are trying access a small bit from one part of card and other small bits from other parts quickly, it ends up taking longer on a high class card because it initializes each part before access it... a lower class card without this initialization ends up being quicker when accessing many small parts quickly, but it doesn't get the speed boost in sequential read/writes.
Running an OS off a SD card requires being able to access many small parts quickly, so lower class cards generally work better for this task. Besides, the HD2 can't even use the higher write speeds that class 6 and 10 cards give. It may write at 10MB/sec with a card reader, but in the HD2 it will only go at 4 or 5MB/sec.
This doesn't necessarily mean all cards are like this... some class 10 cards may have a good random access speed, and some class 2 cards may not... it depends on brand and what specific chips are used in the card, also. But when running an OS, random access speed is generally most important, and that speed is not rated in the class rating at all. It isn't even usually kept consistent from batch to batch of the same card... you may get a class 4 sandisk that has a great random access speed, but then the same brand and class card made at the factory a month later may not have as good random access speed.
Best thing to do to make sure you get a good card, is to buy a good quality brand like sandisk (kingston cards are usually rebranded junk even though they are knowns as a good name brand for some reason... DO NOT BUY KINGSTON), but anyways, get a good class 2 or 4 Sandisk from a reputable dealer so you know it's not fake. Sandisk seem to be most consistent with having good random access speeds.

zarathustrax said:
The class is decided on write speed.... read speed has nothing to do with it. My class 4 Sandisk has a higher read speed than any class 10 card I've tested. Also, tweaks that card manufacturers do to increase the sequential write speed usually ends up lowering the random access speed, which will cause lag when running an OS off of it. High class cards are set up so they initialize and prepare the part of the chip that will be written or read from so that the sequential read/write speed is greatly increased, but this initialization takes a little extra time to do, so when you're are trying access a small bit from one part of card and other small bits from other parts quickly, it ends up taking longer on a high class card because it initializes each part before access it... a lower class card without this initialization ends up being quicker when accessing many small parts quickly, but it doesn't get the speed boost in sequential read/writes.
Running an OS off a SD card requires being able to access many small parts quickly, so lower class cards generally work better for this task. Besides, the HD2 can't even use the higher write speeds that class 6 and 10 cards give. It may write at 10MB/sec with a card reader, but in the HD2 it will only go at 4 or 5MB/sec.
This doesn't necessarily mean all cards are like this... some class 10 cards may have a good random access speed, and some class 2 cards may not... it depends on brand and what specific chips are used in the card, also. But when running an OS, random access speed is generally most important, and that speed is not rated in the class rating at all. It isn't even usually kept consistent from batch to batch of the same card... you may get a class 4 sandisk that has a great random access speed, but then the same brand and class card made at the factory a month later may not have as good random access speed.
Best thing to do to make sure you get a good card, is to buy a good quality brand like sandisk (kingston cards are usually rebranded junk even though they are knowns as a good name brand for some reason... DO NOT BUY KINGSTON), but anyways, get a good class 2 or 4 Sandisk from a reputable dealer so you know it's not fake. Sandisk seem to be most consistent with having good random access speeds.
Click to expand...
Click to collapse
Before you knock Kingston take a look at this posted by engadget.com
While some camps are pumping out larger microSDHC cards, Kingston's done the world a favor by working on speed instead. The result is this Class 10 16GB microSDHC card --possibly the world's fastest of its kind (at a minimum data transfer rate of 10MB/s). Who would need this, you ask? Well, there's the speed freak in your own self that you're trying to suppress, for starters, and don't forget all those snazzy phones that can do 1080p video recording. As with most nice things in life, this blistering card will cost you a fair bit --$138 for the card sans adapters. Oh, go on, it's totally worth your liver. Show full PR text Kingston Digital Ships Speedy Class 10 MicroSDHC Card Large Capacity, Fast Performance a Perfect Match for Memory-Hungry Devices FOUNTAIN VALLEY, Calif., Feb. 15 / PRNewswire/ --Kingston Digital, Inc., the Flash memory affiliate of Kingston Technology Company, Inc., the independent world leader in memory products, today announced the release of a 16GB microSDHC Class 10 card. The high-capacity card complies with the SD™ Association Specification 3.00 to meet Class 10 requirements. The 16GB microSDHC card has a minimum data transfer rate of 10MB/sec. and ships either as a stand-alone microSDHC card or with adapters. "With the new speed class, host devices such as high-definition cameras or the latest smartphones are being designed to optimize their write performance to take advantage of the more responsive memory card speeds," said Wendy Lecot, Flash card business manager, Kingston®. "Now that the Class 10 card specification is five times faster than a Class 2 card, users will see swifter copying and transferring of photos, music, videos and e-books when using a multi-format card reader such as the Kingston Media Reader or MobileLiteG2 with a PC. Kingston takes mobility and versatility a step further with the addition of the SD adapter pack (Kingston part #: SDC10/16GB), and the SD and miniSD adapter pack (Kingston part #: SDC10/16GB-2ADP). Inserting the card into the SD adapter turns it into a large-storage, speedy SDHC card that can be used to capture continuous images or videos in digital cameras. Kingston also includes an adapter for other devices that utilize the miniSD form factor. Either adapter pack allows users to store all data on one card across multiple Class 10 device platforms. The 16GB microSDHC Class 10 card is backed by a lifetime warranty, 24/7 tech support and legendary Kingston reliability. For more information visit www.kingston.com.
Always buy directly from the company. Or a known and trusted retailer.
Sent from my HTC HD2 using XDA App

I recommend flashing NAND

Well my Sandisc Class 2 has a write speed of 12,xx MB/s. So what´s the deal about Kingstons "data transfer rate of 10MB/s"? Maybe they are just selling a label? And they always talk about sequential speed. Sequential is good for taking photos with your camera or maybe record a nice video. Android is using small files random. The class 2 and 4 Sandisc are a lot faster at these levels. I would not recommend anyone spending a single Cent more for a class 10 card. But on the other hand... Test your class 10 card with crystalmark and post the results. I would love to see a good class 10 for the first time.

Odhinn said:
Well my Sandisc Class 2 has a write speed of 12,xx MB/s
Click to expand...
Click to collapse
I believe you are talking about the read speed of that sandisk class 2 card, not the write speed, which is about ~3-4MB/s.
How do I know? I have the same card brah

I'm not saying Kingston is the best company or card. Imho I just think there a good company. I for one wish I bought an ATP card or Transend. I'm going to run some tests on all my cards later and post my results.
Sent from my HTC HD2 using XDA App

i think u need to flash ur memoery card

Sandisk Class2 8GB
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (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 : 18.422 MB/s
Sequential Write : 12.559 MB/s
Random Read 512KB : 18.011 MB/s
Random Write 512KB : 2.109 MB/s
Random Read 4KB (QD=1) : 2.974 MB/s [ 726.1 IOPS]
Random Write 4KB (QD=1) : 0.019 MB/s [ 4.7 IOPS]
Random Read 4KB (QD=32) : 3.011 MB/s [ 735.1 IOPS]
Random Write 4KB (QD=32) : 0.019 MB/s [ 4.7 IOPS]
Test : 100 MB [I: 69.2% (4531.8/6551.3 MB)] (x2)
Date : 2011/01/24 17:31:04
OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x86)
But that is just the 8GB one. The 16 GB is slower sequentialy. But anyway it is better in everyday use with android roms.
Sandisk Class2 16GB
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (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 : 13.383 MB/s
Sequential Write : 5.324 MB/s
Random Read 512KB : 12.611 MB/s
Random Write 512KB : 3.623 MB/s
Random Read 4KB (QD=1) : 0.958 MB/s [ 233.8 IOPS]
Random Write 4KB (QD=1) : 0.659 MB/s [ 161.0 IOPS]
Random Read 4KB (QD=32) : 0.658 MB/s [ 160.6 IOPS]
Random Write 4KB (QD=32) : 0.652 MB/s [ 159.3 IOPS]
Test : 100 MB [I: 12.8% (1.9/14.8 GB)] (x2)
Date : 2011/01/28 22:01:15
OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x86)
Am I allowed to write class 12 on the the 8GB one?

zarathustrax said:
No, a class 10 will not make it perform any faster. Read speeds are about the same on class 2 as class 10. Class 10 just has faster sequential write speed... but the HD2 wouldn't take advantage of it anyways. No point in getting more than class 4 for hd2. Actually, class 2 and 4 cards generally will run android better than class 6 or 10, because higher class cards tend to have worse random access speeds than lower class cards.
Click to expand...
Click to collapse
I have a class 2 and intend to get a higher one, but now I think it's good enough, thanks!

Odhinn said:
Sandisk Class2 8GB
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (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 : 18.422 MB/s
Sequential Write : 12.559 MB/s
Random Read 512KB : 18.011 MB/s
Random Write 512KB : 2.109 MB/s
Random Read 4KB (QD=1) : 2.974 MB/s [ 726.1 IOPS]
Random Write 4KB (QD=1) : 0.019 MB/s [ 4.7 IOPS]
Random Read 4KB (QD=32) : 3.011 MB/s [ 735.1 IOPS]
Random Write 4KB (QD=32) : 0.019 MB/s [ 4.7 IOPS]
Test : 100 MB [I: 69.2% (4531.8/6551.3 MB)] (x2)
Date : 2011/01/24 17:31:04
OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x86)
But that is just the 8GB one. The 16 GB is slower sequentialy. But anyway it is better in everyday use with android roms.
Sandisk Class2 16GB
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (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 : 13.383 MB/s
Sequential Write : 5.324 MB/s
Random Read 512KB : 12.611 MB/s
Random Write 512KB : 3.623 MB/s
Random Read 4KB (QD=1) : 0.958 MB/s [ 233.8 IOPS]
Random Write 4KB (QD=1) : 0.659 MB/s [ 161.0 IOPS]
Random Read 4KB (QD=32) : 0.658 MB/s [ 160.6 IOPS]
Random Write 4KB (QD=32) : 0.652 MB/s [ 159.3 IOPS]
Test : 100 MB [I: 12.8% (1.9/14.8 GB)] (x2)
Date : 2011/01/28 22:01:15
OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x86)
Am I allowed to write class 12 on the the 8GB one?
Click to expand...
Click to collapse
To be honest I never saw such a write speed for a micro sd, especially for a class 2 version ! and I do have the sandisk class 2 16gb version which can only reach a maximum of 4 MB/s of write speed...
If I learned anything from you Odhinn today, it would be to never to trust those claimed Classes anymore. From now on, I will just try to do a research before buying such a card again.

My Transcend 16GB class 6 whrite 16mb/s and read 21mb/s!
Transcend the BEST

just found this thread.. i tested 2 sd cards,having problems in android sd with 16gb kingston..
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (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 : 7.055 MB/s
Sequential Write : 4.135 MB/s
Random Read 512KB : 7.066 MB/s
Random Write 512KB : 0.671 MB/s
Random Read 4KB (QD=1) : 1.780 MB/s [ 434.6 IOPS]
Random Write 4KB (QD=1) : 0.006 MB/s [ 1.4 IOPS]
Random Read 4KB (QD=32) : 1.821 MB/s [ 444.6 IOPS]
Random Write 4KB (QD=32) : 0.006 MB/s [ 1.4 IOPS]
Test : 500 MB [I: 31.2% (4.6/14.9 GB)] (x5)
Date : 2011/04/19 22:56:47
OS : Windows Vista Home Premium Edition SP2 [6.0 Build 6002] (x86)
16gb class4 kingston
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (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 : 2.184 MB/s
Sequential Write : 5.750 MB/s
Random Read 512KB : 2.182 MB/s
Random Write 512KB : 1.682 MB/s
Random Read 4KB (QD=1) : 1.535 MB/s [ 374.7 IOPS]
Random Write 4KB (QD=1) : 0.017 MB/s [ 4.2 IOPS]
Random Read 4KB (QD=32) : 1.077 MB/s [ 262.9 IOPS]
Random Write 4KB (QD=32) : 0.065 MB/s [ 15.8 IOPS]
Test : 500 MB [I: 76.4% (5798.1/7585.2 MB)] (x5)
Date : 2011/04/19 23:59:57
OS : Windows Vista Home Premium Edition SP2 [6.0 Build 6002] (x86)
daneelec 8gb class4

[Q] Testing the i5800 card speed

Could someone please try "SD Tools" and report you SD cards speeds. Im getting about 2.5 mb/s on both read and write. Tried several cards type 4 and 6. Cards reach full speeds when tested on a PC. Is that a limit for this phone or something is wrong with my unit? I had a Adata SD card die on me recently, too.. Could have been one of the fakes.
So, download and run "SD Tools" program on your i5800 and let me know the results. Also the type of sd card. I cant find any results on internet or this forum. I cant belive that i5800 is capped at 2.5 mb/s.
Thanks in advance everyone!

with the 1GB stock card, I got following result:
2.2 MB write speed
and
4.9 MB read speed.

8GB a-data
3,2 W
6,2 R

Hmm interesting. It seems something is wrong with my phone. I get 2.5 read on genuine 8GB class 4 sandisk card FAT32, at this moment. Thanks! Feel free to add the scores.

is it MB or mB, big difference!

stubborn_d0nkey said:
is it MB or mB, big difference!
Click to expand...
Click to collapse
MB/s
Hope "SD tools" can be trusted for Galaxy 3? Guess its time to RMA the phone.

-3.4 MB/s for writing
-4.7 for reading

Ok here is the concluson. I just got a new Class 6 Transcend card to make sure. Phone is OK. I got around 5.5 on both read and write. This is my third card so far.
No1: A-data 8gb Class 6 - died after 3 months of use, was always slow around 2.5 MB/s. I suspect it to be fake!
No2: Sandisk 8gb Class 4 - slow scores like its a Class 2 card. Also 2.5 MB/s. Tested it and its not one of the fake cards. Bought at a big reliable store. It seems Sandisk has some Class 2 cards marked as Class 4. WTF! Hope to return it.
No3: Transcend 8gb Class 6 - finally working as it should! Transfer speeds up to specs. Actually getting close to Class 10 scores with adapter under windows?!
I was either very unlucky or the SD card market is really crazy right now. Im just glad I dont have to return my phone. Thanks everyone for results!

Transcend 8gb Class 6- read=5mb/s
- write-4mb/s

Write = 3.7 MB/s
Read = 17.5 MB/s
Sent from my Lestatious v1.4.5.1 Galaxy 3 FROYO

Ya Mines also good But I dont understand wat CLASS

samsung 1 GB (i dont know class):
read: 2.5 MB/s
write: 2.4 MB/s
a-data 16 GB (class 10):
read: 4.9 MB/s
write: 4.4 MB/s

My cheap 2 GB Kingston:
Write: 3.7 MB/s
Read: 4.9 MB/s

Write/read speed of SdCard in I5800.

Hello.
I got a question to You about write/read speed in our I5800.
Because I bought micro sdhc 8gb class 10 card (GOODRAM) and I tested it in Antutu benchmark. Write/read was about 4.5-4.8 Mb/s.
But in PC I tested it and I have read:20 mb/s, write 12-14 mb/s.
So, I5800 can't handle class 10 card?
Please, write in this topic Your Antutu scores of SdCard (and which card and class You use)
Greetings.
Sent from my GT-I5800 using XDA App

Well the phone limits the read write speed somehow that s what I ve heard. Why don t you try the SDCard reading speed fix??

Because it may cause lag in playing videos. Or I'm not right?
Sent from my GT-I5800 using XDA App

just read in a german board that there is a conjunction of:
class and size
so:
a class 2 1GB may be faster than 16GB class10
and
class 6 may be the fastest that may be "supported" by the G3, so class 6 is the "fastest" really usable speed in G3 due to G3 bottleneck
all above is waste of money
just ordered class6
4, 8 and 16 GB
cards to verify theory above of speed and capacity in different sizes
keep you updated

Waiting your tests...

tests done
and here are the results:
---------------------------------
Standard 1GB sandisk (300MB free)
------antutu---PC-USB---h2test PC
write:.2,3....... 2,2........... 4,7
read:..2,3....... 2,1......... 10,2
sandisk 4GB Class6:
------antutu---PC-USB---h2test PC
write: 4,9....... 4,9......... 11,2
read:. 4,4....... 4,4......... 17,6
Transcend 8GB Class6:
------antutu---PC-USB---h2test PC
write: 4,8------4,4------ 10,9
read: 4,3------4,4------ 19,9
ADATA 16GB Class6:
------antutu---PC-USB---h2test PC
write: 5,0----- 4,4------- 16,0
read: 4,4----- 4,6------- 19,5
---------------------------------
the program h2testw is found here:
http://www.heise.de/software/download/h2testw/50539
-antutu bench is done on mobile phone direct
-PC-USB: the sd card is connected via USB mass storage from mobile to the PC
-h2testw PC: the sd card is tested directly in a sd slot
all values in MB/s

[Q] replace sdcard on WP7.5

Currently, I have an unlocked T-mo DVP, running WP7.5 8107.
Can I replace its sdcard now ? I want to use a Sandisk 32GB class 10, could it be used on our DVP ?
Thanks.

phanquangkhanh said:
Currently, I have an unlocked T-mo DVP, running WP7.5 8107.
Can I replace its sdcard now ? I want to use a Sandisk 32GB class 10, could it be used on our DVP ?
Thanks.
Click to expand...
Click to collapse
I would stay away from the class 10's -- they have inconsistent troubles with many smartphones including reports of problems on the DVP.
This is the one I used: (it's a class 4) Costs not even $20 on Amazon.
http://www.amazon.com/gp/product/B007KFXIDE/ref=oh_details_o02_s00_i00
Works beautifully.

All of the SanDisk Class 4's work great. The one that time_pilot_aka linked you to is the 32GB version of the same 8GB and 16GB cards are what Dell used in these phones. Model numbers ending in B35, B35N or AFFP (amazon version.)
If you want to spend a little extra, buy one of the following:
SanDisk Mobile Ultra MicroSDHC Class 10 UHS-1 (SDSDQUA-032G-A11A)
Samsung MicroSDHC Class 10 (MB-MSBGA/US or MB-MSBGA/EU or MB-MSBGA/KR etc)
All of these have blazing fast sequentials reads and writes with random reads and writes appropriate for Windows Phone. These are the only Class 10 cards I can recommend, as many have random write speeds a hundred times slower.
In a real world test, there is little difference. Tested side-by-side two DVPs, one with SanDisk 32GB Class 4 (SDSDQM-032G-B35N) and one with SanDisk Mobile Ultra 32GB (SDSDQUA-032G-A11A.) The biggest difference I saw was about a 25-30% reduction in download and installation time of a 100MB XBOX Live game app.

I've also seen Class 2 being okay, taking away the marketplace lockups.
http://www.zdnet.com/blog/cell-phon...sd-cards-i-turned-mine-into-a-32gb-model/5405
I've heard of issues on class 10 cards. Not only on dell venue pro, but any phone.
I suppose I can let you know though, Because I just ordered mine today. Going with a class 2 like the link above.

Thank you. I appriciate all your helps.
I will try with a 32gb class 4.
I have a question, currently my phone is on Winp 7.5 build 8107.
Can i change the sdcard at this point by choosing reset option in setting, then replace sdcard ? Or I have to return to Nodo before replacing the sdcard?
Sorry, my English is not good.

I replaced mine a couple of months ago and have had no problems. Didn't have to return to an earlier version. Enjoy having one of the largest capacity WP's once you're done!

SirRudolph said:
I've also seen Class 2 being okay, taking away the marketplace lockups.
http://www.zdnet.com/blog/cell-phon...sd-cards-i-turned-mine-into-a-32gb-model/5405
I've heard of issues on class 10 cards. Not only on dell venue pro, but any phone.
I suppose I can let you know though, Because I just ordered mine today. Going with a class 2 like the link above.
Click to expand...
Click to collapse
The SanDisk Class 2 that guy used was model SDSDQ-032G-A11M, which they later began labeling as Class 4 to better reflect the reality of the write speeds, and I suspect to compete with what was a whole new crop of competing Class 4 cards released around November 2010. The SDSDQ-032G-B35N model came later, and is now cheaper than the SDSDQ-032G-A11M.
The benchmarks cover a pretty broad range, but in the end I decided to go with the B35N based on the faster random read speed.
Here are my own personal benchmarks for both cards, using a USB 2.0 adapter on USB 2.0 port.
SDSDQ-032G-A11M (bought and tested December 2010)
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CrystalDiskMark 3.0 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World :[...]
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 7.678 MB/s
Sequential Write : 5.014 MB/s
Random Read 512KB : 7.470 MB/s
Random Write 512KB : 4.703 MB/s
Random Read 4KB (QD=1) : 0.969 MB/s [ 236.6 IOPS]
Random Write 4KB (QD=1) : 2.003 MB/s [ 489.0 IOPS]
Random Read 4KB (QD=32) : 0.574 MB/s [ 140.1 IOPS]
Random Write 4KB (QD=32) : 1.746 MB/s [ 426.3 IOPS]
Test : 100 MB [E: 0.0% (0.0/29.7 GB)] (x5)
Date : 2010/12/23 13:48:47
OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x64)
-----------------------------------------------------------------------
SDSDQM-032G-B35N (bought and tested November 2011)
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World :
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 20.015 MB/s
Sequential Write : 4.396 MB/s
Random Read 512KB : 19.352 MB/s
Random Write 512KB : 0.732 MB/s
Random Read 4KB (QD=1) : 2.587 MB/s [ 631.7 IOPS]
Random Write 4KB (QD=1) : 1.185 MB/s [ 289.2 IOPS]
Random Read 4KB (QD=32) : 2.542 MB/s [ 620.6 IOPS]
Random Write 4KB (QD=32) : 0.720 MB/s [ 175.9 IOPS]
Test : 100 MB [H: 0.0% (0.0/29.7 GB)] (x5)
Date : 2011/11/14 18:10:32
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
-----------------------------------------------------------------------
Based on current prices I would get the Samsung MB-MSBGA card because it vastly outperforms both of these cards, and it's only about $10 more. Just make sure to run benchmarks on it. I (foolishly) bought a "bulk package" version from a local ebay seller, and the 4k random writes @ 0.032MB/s were over 40 times slower than a known-genuine card.