Database Users

Anyone using a class 10 card?

Hey. Just curious how many of you have replaced the stock 16gb class 2 sdcard with class 4,6 or 10. Can you chime in with your inputs on performance between these classes. I know the theoretical transfer speeds, but I am curious how they actually perform in day to day use. Would jumping from a class 2 to class 6 be noticeable, or a class 6 to class 10?
Thanks

I am interested to.
Have just upgraded to an Ebay 16gig Class 6. Speed is faster than a Class 2 but not sure if it is a Class 4 or class 6.
Tempted to buy a 8gig Class 10 but struggling to find a reputable source of these.
In case you don't know Class x denotes the write speed. Class 2 has a 2meg/sec. Class 6 has a 6meg/sec write speed. Also gt a increase in read speed. All must be good for the HD unless the Interface is slower than the card??

dusty_nz said:
I am interested to.
Have just upgraded to an Ebay 16gig Class 6. Speed is faster than a Class 2 but not sure if it is a Class 4 or class 6.
Tempted to buy a 8gig Class 10 but struggling to find a reputable source of these.
In case you don't know Class x denotes the write speed. Class 2 has a 2meg/sec. Class 6 has a 6meg/sec write speed. Also gt a increase in read speed. All must be good for the HD unless the Interface is slower than the card??
Click to expand...
Click to collapse
From my reading and investigation, not many devices out there support such high speed, I'm thinking phone isn't one of the device that do. I would like to see someone do some testing and see if there is a difference on a HD2 between a class 6 vs class 10.

I didn't know they had a class 10, but I'm running a class 6 and I can tell the difference from the 16gb stock card. Loading Android is a lot faster too.
Sent from my HTC HD2 using XDA App

I have a class 10... Its a great diference.

I've got a couple of 16Gig class 2s and a 4Gig class 10. I can certainly tell a difference. I haven't done any empirical testing but gut says it's almost twice as quick. The difference comes when you multitask, getting a couple apps open, app loading, etc.
The problem with the 4Gig is the obvious lack of size. I'm thinking of buying a 32Gig class 4.

xicko said:
I have a class 10... Its a great diference.
Click to expand...
Click to collapse
between a class 6 and 10, is there still any noticeable improvements with the phone?

I want video evidence.

Lorddeff07 said:
I want video evidence.
Click to expand...
Click to collapse
Agree! A video might help us to decide if it is worth buying a class 10 card.

bangsters said:
between a class 6 and 10, is there still any noticeable improvements with the phone?
Click to expand...
Click to collapse
Looking at numbers alone, a class 6 is three times faster than a class 2 and a class 10 is five times faster than a class 2 so upgrading from a class 2 would appear to be a sure fire bet in both cases
In comparison a class 10 is only 1.6 times faster than a class 6.
So I think I will stick with my class 6 for now until class 12+ comes out.

So in conclusion do you guys think a faster SD card is necessory? because once xda team finish develop a perfect android rom i believe they are gonna make it a rom, in that case we would'nt need a faster SD card, But i really wonder if a faster SD card improves the performance? Can someone kindly provide a video for this ? Thanks ,,

class 10
I have a 16gb kingston class 10, compared to my Transcend 8gb class 6, not that much difference, compared to my Class 2 16gb that came with the phone? huge difference.

I'm now going out, to buy a 16GB classe 4 , i think is sufficient, given that in September Cttula will provide NAND, and the class will no longer important, and I'd rather have more space for my photos and videos, in vacation than a business card 8GBclasse10 faster.

Is the ETA for NAND September?

Nand speed vs. Class 10 card?
Anyone know what the read/write speed of the nand memory is as compared to the say the read/write speed of a class 10 card? I know it should be faster, but is it really that much faster?

bangsters said:
Hey. Just curious how many of you have replaced the stock 16gb class 2 sdcard with class 4,6 or 10. Can you chime in with your inputs on performance between these classes. I know the theoretical transfer speeds, but I am curious how they actually perform in day to day use. Would jumping from a class 2 to class 6 be noticeable, or a class 6 to class 10?
Thanks
Click to expand...
Click to collapse
i got class 10 kingston 16gb,
transfers between pc and phone is up tp 6 mb/s read and write, but on the phone it self i think it's faster.
previously i had class 2, 8gb sandisk and it was alot slower...

how do I know which class the SD card is?

i use a class 10 card in my digital slr and it makes quite a big difference. i'm sure it would create a significant performance boost with android

pack21 said:
I'm now going out, to buy a 16GB classe 4 , i think is sufficient, given that in September Cttula will provide NAND, and the class will no longer important, and I'd rather have more space for my photos and videos, in vacation than a business card 8GBclasse10 faster.
Click to expand...
Click to collapse
I dont find any microSD 16gb classe4 just, classe 2 and classe 10 - 100€
8gb classe4 i found for 20€

somebully said:
Is the ETA for NAND September?
Click to expand...
Click to collapse
Yes
reocej said:
Anyone know what the read/write speed of the nand memory is as compared to the say the read/write speed of a class 10 card? I know it should be faster, but is it really that much faster?
Click to expand...
Click to collapse
I think, it cant be comparable....starting by speed and smooth.

[Q] Micro Sd class 10 or class 6?

I'm looking to buy a new MicroSD and wondering if getting a class 10 over a class 6 would make a significant difference to the phone (if im using data2sd and or apps2sd)
Thank you!

I think the difference between class 6 and 10 would feel minor, where-as the difference between the class 2 and class 6 feels huge.
And since this is the Vibrant forums, I should mention that the internal memory in the phone is very fast. I tested it at over 10MB/s write on my first phone. My second phone its closer to 6 MB/s write. So you apps and stuff should run perfectly fine from the internal app storage.
I should also mention that I purchased the new kingston micro sd thats rated class 4 but claims speeds upto class 10. Upon testing that I got 9 MB/s write. ($28 after $10 reward from buy.com). My previous class 2 16GB card tested it 2.6 MB/s write for comparison.

Shane_pcs said:
I think the difference between class 6 and 10 would feel minor, where-as the difference between the class 2 and class 6 feels huge.
And since this is the Vibrant forums, I should mention that the internal memory in the phone is very fast. I tested it at over 10MB/s write on my first phone. My second phone its closer to 6 MB/s write. So you apps and stuff should run perfectly fine from the internal app storage.
I should also mention that I purchased the new kingston micro sd thats rated class 4 but claims speeds upto class 10. Upon testing that I got 9 MB/s write. ($28 after $10 reward from buy.com). My previous class 2 16GB card tested it 2.6 MB/s write for comparison.
Click to expand...
Click to collapse
Just to help out here...
the difference between class 2 and class 6 is the exact same as class 6 and class 10. Remember the cd-rom speeds (52x, etc)? That's how the speed is calculated for a SDHC card. So a class 2 = 2x cdrom, class 6 = 6x, class 10 = 10x.
whether our hardware has capability to handle what a class 10 can do, that I don't know. I'd definitely advise to get something with more space than a 2GB card though - I'm not sure everyone needs a 32 (personal opinion/long discussion), but I absolutely agree it should be improved upon.

designerfx said:
Just to help out here...
the difference between class 2 and class 6 is the exact same as class 6 and class 10. Remember the cd-rom speeds (52x, etc)? That's how the speed is calculated for a SDHC card. So a class 2 = 2x cdrom, class 6 = 6x, class 10 = 10x.
whether our hardware has capability to handle what a class 10 can do, that I don't know. I'd definitely advise to get something with more space than a 2GB card though - I'm not sure everyone needs a 32 (personal opinion/long discussion), but I absolutely agree it should be improved upon.
Click to expand...
Click to collapse
I understand that, thats why i picked those classes. But my point is that a class 6 card is 3x the speed of a class2 where class 10 isnt even twice as fast as the class 6. So the perceived difference is smaller, even though the technical difference is the same.

I'm still running a class 2 and I've been wondering if this is holding me back on this phone (card was previously in my G1).
Will the lower classes function the same (creating ext2 etc...) it's just a matter of speed? Just wondering if there's anything that simply can't be done with a class2 or even 6 that could be done with a 10.

CapitalM3 said:
I'm still running a class 2 and I've been wondering if this is holding me back on this phone (card was previously in my G1).
Will the lower classes function the same (creating ext2 etc...) it's just a matter of speed? Just wondering if there's anything that simply can't be done with a class2 or even 6 that could be done with a 10.
Click to expand...
Click to collapse
Just cost you more. Do you really need a class 10 for this phone? Avatar is on a card that isnt even a class 2.

Vegastouch said:
Just cost you more. Do you really need a class 10 for this phone? Avatar is on a card that isnt even a class 2.
Click to expand...
Click to collapse
xD What class was the stock sd card?

I only ever see class 6+ cards being used in higher end compact cameras and SLRs.
Putting anything higher than class 6 in a phone your using for apps/music/movies isn't needed and just a waste of money.
I've also seen a lot of people saying the memory card speeds with the galaxy s are bottlenecked right now, so your not even going to get top speeds with a class 6.

Vegastouch said:
Just cost you more. Do you really need a class 10 for this phone? Avatar is on a card that isnt even a class 2.
Click to expand...
Click to collapse
While the card isn't marked, it tests out at just over 4MB/s which would put it in a class 4.
And we should be clear that the class refers to the write speed. A class 2 will read at 10 MB/s just like the other classes. Where you run into issues with class 2 cards is when you start modding or running programs from the sd card. If you use the card for a swap partition or something the write speed now plays a major factor in the usefulness.
If all you want it for is to place your music files on there and listen to them, then a class 2 will be plenty. That was my initial thought when I bought my 1st 16 GB card for my mytouch3g. Then I got into custom roms and found myself limited.

How do you test the speed of the SD card?

What size microsd card are you looking for? If its a 32GB, I have only seen a Sandisk microsd in Class 2. As far as I know there are no higher classes at this time. Hopefully that will change soon. I would like to get all of my music onto one 32gb card.

designerfx said:
Just to help out here...
the difference between class 2 and class 6 is the exact same as class 6 and class 10. Remember the cd-rom speeds (52x, etc)? That's how the speed is calculated for a SDHC card. So a class 2 = 2x cdrom, class 6 = 6x, class 10 = 10x.
whether our hardware has capability to handle what a class 10 can do, that I don't know. I'd definitely advise to get something with more space than a 2GB card though - I'm not sure everyone needs a 32 (personal opinion/long discussion), but I absolutely agree it should be improved upon.
Click to expand...
Click to collapse
This isnt exactly true. with cdroms the X stands for how much faster it would spin in relation to a audio cd. So 1x ment it spun at the same speed as a audio cd. 2x was twice, ext ext. And this was a max speed.
Classes for SDCard stands for the minimum transfer speed. class two is at least 2mbps, class 6 is 6mbps, and so on.

frankencat said:
How do you test the speed of the SD card?
Click to expand...
Click to collapse
google FDbench
it will test the read and write speed as well as operations per second.

I still can't find a 32gb microsd class 10, anyone find one for sale?

Class 10
Class 10 limitation presently is 8 gig for all brands except the Kingston and soon to be released Silicon Power. The Kingston brand never benches as advertised, so they are not reliable from my point of view. Silicon power has been pretty solid on their claims from my testing versus their claims, but I have not yet got my hands on the latest class 10 16 gig, I have been trying to buy for the since 10-1-2010 but not out in USA yet.
Kingston (in my opinion) is rife with false claims and I find their products have always been sub par.
Flashing and alike works better with class 6 over class 2 & 4. So, if you really want more memory the only 32 gig class 6 I have seen advertised (amazon) are: Transcend, Centon, and Komputerbay (what a name?!) 32 gig Class 6
Other than that, we wil just have to wait until they get the algorithm figured out for a micro ad card with that much ram and that fast.

Get the app "sd card speed test" it works ok Im sure there are others as well

I imagine the only reason you would need a Class 6 card or above is if you plan to take a lot of HD video. Apart from that, even a Class 2 is fast enough to keep up with the still camera, not to mention anything that just requires reads, like music or movie playback.
As for running apps off an external SD card, why would you ever want to do that? You can load close to 2GB on the internal app space, which is likely way faster than any mounted external SD card. I feel like an app whore and I'm not even close to using half that space. By the time apps start getting large enough that it's an issue, we'll be on the Vibrant 2 or beyond.

glad that you asked
merrifield69 said:
I'm looking to buy a new MicroSD and wondering if getting a class 10 over a class 6 would make a significant difference to the phone (if im using data2sd and or apps2sd)
Thank you!
Click to expand...
Click to collapse
because I just picked up a 16G class 10 by WinTec last week and it is VERY fast from boot up with 9G occupied from 15G available (wondered 1G gone to? and that is a lot of gone G lol). It was $42 wo tax expensive but so far the fastest.

Whoohoo
mine 16G class 10 tested 2x >8M and 1x >9M write, 3x > 18M read and it was probably so fast that the result said "unknown class" lol. x means 1 run with 2MB buffer setting. Downloaded app call SD card speed tester.

There are now some 32GB class 6 SDCARDS on the markey, and with 2.2 and installing apps to SD that might matter. It might also matter if you have a TON of music and images, as "Scanning SD for Media" would be faster.
You will pay money for the time savings though.

SD Card Class Survey

For those of you who have upgraded your SD cards: what class of SD card do you have? Is it worth the extra money to get anything other than a Class 2 card?

I stuck with the class 2. I read the more expensive class is more suitable for capturing hd video. I don't do alot of that, I got my 16gb class 2 to store movies.
Samsung Vibrant using Bionix 1.9.1 w/JACs UV/0C v1.1

I have a 16gb card labeled as a class 4 (and priced as such), but it performs like a class 6.
I got it because I was expecting to use Apps2SD at some point in the future and it makes a HUGE difference there.

The stock card is a class 4. I had an 8 GB class 6 from my G1 days that I opted to use instead. Class speed matters, but you need to debate how much read/write are you doing with your SD card. Thankfully the Vibrant has a lot of internal memory too.

The higher the class the more rapid the data transfer. But a reputable, like Sandisk class 4 will outperform a "Joe's SD Co." Class 6 in my experience. I was running a2sd on my G1 with the stock class 2 and I had time to make a sandwich while waiting for apps to open, better result with a class6. Also when transferring large amounts of data between PC and device it will significantly cut down the time.
Sent from my SGH-T959 using XDA App

Class 6 16 gig
have a class 6 16 gig I use alot for data storage fro my work. I have found the Kingston class 10 is slower than this one, read/write speed DO matter if you use it alot, and I do. Silicon power is releasing a class 10 16 gig when I get one Ill report back it benches and see if it meets the stated benches it is claiming

Tweak to Speed up writing speed of sd card?

Hi,
I have class 4 SD card m running Pda's win7.8 rom. the problem I m facing is its lagging and slow then I did a benchmark test using free benchmark app everything is perfect except the write speed which is just 2.1 something, I know it may be a problem of SD card though wanted to know is there any tweak to speed it up through registry or app like andoirds have?
thankyou

no... buy better card...

dxdy said:
no... buy better card...
Click to expand...
Click to collapse
can you guide me which type of card should i buy?
thankyou..

someone write this list but also many others cards is fine
Kingston 4GB Class 4
Kingston 8GB Class 4
Kingston 32GB Class 4
Microcenter 16GB Class 2
SanDisk 8 GB Class 2
SanDisk 16 GB Class 2
SanDisk 16 GB Class 6
SanDisk 32 GB Class 2
i have SanDisk 32 GB Class 2 and speed is around 8 mb/s

Slower card makes
you wait longer,
gets your cpu hotter,
your battery drain faster,
lags the phone,
slow responses of your phone,
Go buy yourself a class10 SD card!
Believe me, if i knew the diffrence, i would buy it 3 years ago...

Thank-you dxdy and stealth21
will buy new SD and report back

[Q] Can Sandisk Ultra 16 GB (Class 10) SD card be used for CM7

I am planning to buy Sandisk Ultra 16 GB (Class 10) SD card.
Can I use it to run CM7 from it?
Will this be better choice over Class 4 as Class 6 is not available?

wastemantej said:
I am planning to buy Sandisk Ultra 16 GB (Class 10) SD card.
Can I use it to run CM7 from it?
Will this be better choice over Class 4 as Class 6 is not available?
Click to expand...
Click to collapse
Ordinarily the SanDisk class 4 is the SD of choice. That is because it has superior small file read/write speeds to higher class SDs. The one you are asking about is relatively new and I don't know if many have tried to see how well it works. Look at this thread to see why most recommend the class 4:
http://forum.xda-developers.com/showthread.php?p=12964262

leapinlar said:
Ordinarily the SanDisk class 4 is the SD of choice. That is because it has superior small file read/write speeds to higher class SDs. The one you are asking about is relatively new and I don't know if many have tried to see how well it works. Look at this thread to see why most recommend the class 4:
http://forum.xda-developers.com/showthread.php?p=12964262
Click to expand...
Click to collapse
So Sandisk cl 4 is enough for running cm 7 from it.(I asked the question because I wanted to be clear wether the UI would be snappy with class 4).
Thank you for saving me some

I honestly can't tell any difference in running from emmc or a Sandisk Class 4... in terms of UI responsiveness..