Can the G tablet handle a a SD HC card ? The user manual just makes reference to the tablet being able to accept up to a 64 GB 'SD card'. Just want to make sure that the card I purchase will be compatible with the tablet. If it can take a HC card, what class is recommended? If it isn't compatible with HC cards, then I suppose a generic 32 GB SD card will suffice.
Yes, it can handle SDHC for sure. SDXC is needed for >32GB, but I can't speak with experience on that.
Thanks for the input. Now I just need to find out what class to get.
davekgolf said:
Thanks for the input. Now I just need to find out what class to get.
Click to expand...
Click to collapse
I just joined the forum after getting my G Tablet, so this is my first post and I can't post url yet. Anyways, I've been reading up on what class card to get, and was looking at the different class ratings and found this source (warning, it is wikipedia):
go to wikipedia and type "Secure Digital"
The class rating, according to the source, states the rating is x equal to 1.2Mb/s (derived from CD-ROM speeds of old). The highest class speed I've seen is class 10. The question is, will the G Tablet benefit fom class 10 (there is a premium price tag) over a less expensive class 4 card. Here is an article I read that shows speed compared to a class 4 card with both class 10 and class 4cards in a Droid X. The Class 10 was faster, but marginally:
google "32gb micro sdhc class 10 review"
When run off a PC, there was a significant speed improvement, but not when running from a smartphone device.
So the question to ask, "Is the cost/performance of the class 10 worth it?"
From the gTablet, I would bet you will see little to no difference based on card class. For me the speed benefits increases with the size of the card. eg it isn't that big of a deal to fill a 1gb card at 2 mb/s, but it takes ~16 hours to fill a 32gb card at that speed. I would say for anything 8gb or larger, it is probably worth it to buy the faster card.
Late post to this thread, but for search purposes.......
I bought my gTab specifically to watch movies on, movies I've already ripped from my dvd collection.
I own a few 16 and 32gb microSD cards, and I have a 16/32 in class4 and a 16/32 in class 10. Watching movies from either card shows no difference at all. I've tested each microSD card I own with the same movie file and they all play perfect.
For other purposes I guess speed might make a difference. But running movies (at the settings below) makes no difference at all between the average class4 or the more costly class10.
DVDFab with a Fixed bitrate of 3000 kbpp, 128 kbit DolbyProLogic2 sound, mp4 format(h.264 video/ aac audio) with 848x480 resolution, 29.97fps, 100% volume and no deinterlacing.
With those settings my movies play flawlessly and look fantastic, on all my microSD cards no matter the "class".
3000kbps < 4MBps
shoboy said:
Late post to this thread, but for search purposes.......
I bought my gTab specifically to watch movies on, movies I've already ripped from my dvd collection.
I own a few 16 and 32gb microSD cards, and I have a 16/32 in class4 and a 16/32 in class 10. Watching movies from either card shows no difference at all. I've tested each microSD card I own with the same movie file and they all play perfect.
For other purposes I guess speed might make a difference. But running movies (at the settings below) makes no difference at all between the average class4 or the more costly class10.
DVDFab with a Fixed bitrate of 3000 kbpp, 128 kbit DolbyProLogic2 sound, mp4 format(h.264 video/ aac audio) with 848x480 resolution, 29.97fps, 100% volume and no deinterlacing.
With those settings my movies play flawlessly and look fantastic, on all my microSD cards no matter the "class".
Click to expand...
Click to collapse
You wouldn't expect their to be a difference in transfer rate for 2 reasons. First, your 3000kbps bitrate = 3Mbps = 375KBps and is well within the transfer rates of Class 4 (4MB/s), Class 6 (6MB/s) and Class 10 (10MB/s) and second, the movies don't tranfer faster because the the movie is set to play at a fixed frame rate.
You are correct that for running a movie the faster card is of no benefit but time how long it takes you to copy the movies from your PC to your card & see how much time the faster card will save you.
Strictly for the sake of knowing and answering my new curiosity about it, I'll try that this weekend. I usually just drag/drop movie files onto various folders on my pc desktop then just "right click-send to" to the microSD's(in a usb adapter) and other USB thumbdrives that are plugged into my tower....then just walk away and make dinner, play with the kids, etc....... Later on at night it's all set. For my personal usage, the class 4 cards are perfect...performance and cost.
To get the rated speed for each device class, the filesystem structures on microSD card also have to be aligned correctly. Mis-alignment has the potential to cause drastic speed reductions. Use the SD Formatter on all external SD cards.
Related
SanDisk Mobile Ultra MicroSDHC 16GB SDSDQY-016G-E11M
I had a new Class 4 16GB Micro SD Card delivered yesterday after one of my cards failed.
Speed was markebly improved over the old Class 2 cards I have. Data transfer was particularly impressive!
The card is a little pricey £££ and I could have replaced the faulty card with another cheaper Class 2 but thought I'd give the "Ultra" card from Scandisk a go.
I watch a lot of video (on the train on the way into work in London - Heroes, Battlestar Callactica etc !!!) and speed is important - especially for standard DivX with no additional compression! Any lag I had previously has now gone - Very impressed....
I ordered the card from Amazon - link below - and although it states 3-4 days for delivery it arrived next day.....
Here>>> Amazon.co.uk
ScanDisk Official details can be found >>HERE<<
.
Are you getting any skipping/jumping/pausing of music with this card? I would be interested to hear especially with your rom as I did get such problems with my class 2 16gb card and same rom (Dutty 2.3). I've just flashed my old Polaris to 3LIT3 VI Suite and am now getting the problems on this device which I never used to. Hence my theory about the card being the cause of the problem.
Will be interested to hear.
Thank you.
Wow, that is certainly impressive. I presume you're using CorePlayer to play the vids? And no lag at all? Awesome.
PS: To Galactica... best ship in the Fleet.
I've had the card for a few days mow and have just returned from London and can confirm that the video playback is greatly improved. I'm using CorePlayer - I used to get some ghosting (phasing) and the odd skip but now its very smooth indeed.
custardo01 With regard to music - I have never had an issue playing music so cant comment on why your experiencing a problem - I'd recommend copying an audio file onto the main solid state drive (device) and play from there to confirm its a problem with the card before purchasing a new one though?
Arthenik .....Galactica - Absolutely - watched the 2 hour final episode yesterday (on the HD) fantastic but such a shame its over!!!!
.
Well, I guess I'll have to get one too. I'm really impressed by your reactions.
Regarding Galactica, I watched the finale on air and then subsequently at a local Frak Party. Both times were frakkin' awesome. And yeah, I'll really miss the show a lot.
bench of new CLASS 4 SanDisk Mobile Ultra MicroSDHC 16GB SDSDQY-016G-E11M
Hello,
Could you bench the read/write speed of your card with a tools like SKTOOLS
It would help me a lot to make my choice.
Thanks
Palmde said:
Hello,
Could you bench the read/write speed of your card with a tools like SKTOOLS
It would help me a lot to make my choice.
Thanks
Click to expand...
Click to collapse
Palmde - I'll try to find some time this weekend to benchmark but as per previous posts I am very impressed - especially with viewing uncompressed video!
.
Thank's a lot for your help Blob8me.
I own already a SanDisk Mobile Ultra MicroSDHC 8GB and i am very hapy about it: I can watch most of my movies on my HD, without to re-encode them.
I hope that the 16GB version will be at least as good.
So I am waiting your results.
£38.99 including delivery here. They say it's class 4 ?
Just asking but where the hell do you need class 4 microsdhc?
class 4 means it writes 4mb/sec VIDEO to same place in card, so datastream stays healthy for camera usage for example 1080p HD CAMERA.
It doesnt mean it only works that slow. Our HD cannot even match those speed anywhere near. And second these phones do not use that kind of file management to save continuous file stream.
For example I have kingston class 2 and it writes 12mb/sec when using cardreader on PC.
Or example 2 so people really understands. There is SDHC card from sandisk which is Extreme III 30mb/s edition. That is only class 6 card. And it still writes as fast as 30mb/sec. Ive tested this and can confirm since I have those on my DSLR camera.
So question is why do you pay MORE for NOTHING?
Dont read class number, read what it writes and reads per second its what you want to know.
Edit: Ofcourse bigger class means it can be better but class number doesnt tell its real speed. since class number is for continuous data (video writing)
I manage a consumer electronics store and a lot of people seem to be misinformed when shopping for memory cards for new mobile devices. After spending a year or so on this site it seems many people here are misinformed as well- so I thought I would open up a discussion.
When looking at memory cards (micro in this case; but most follow the same format) there are 3 important pieces of information to review.
1. Capacity- some people will do fine with a 1gig card while others use their device to store music, movies, and pictures and need more space. At the time of this post the largest micro-SD card available (as far as I know) is 16gig.
2. Speed rating- obviously you want the most performance you can get out of a memory card so any information stored on that card can be accessed quickly, and with so many new ROM's running apps from the SD card the transfer needs to be both fast and efficient. Most cards offer anywhere from 6mb/sec to 15mb/sec (with other types of flash speeds near the 45mb/sec range). The speed rating is a rating of the MAXIMUM READ/WRITE SPEED capabilities, and is often difficult to find on the product info- even more difficult to measure.
3. Class rating- is the most misunderstood rating of all- and the most advertised (the class rating is written on the front of most cards). The class rating IS NOT a measure of how fast information can be accessed from the card by the device. Most people believe that a class 2 card is guaranteed to read/write at 2mb/sec while a class 6 is guaranteed to read/write no slower than 6mb/sec, the next logical step is to believe that a class 6 card will be faster and more efficient than a lower class. THIS IS NOT TRUE. What the class rating is actually defining is whether or not the card will work in your device. A class 6 card will only function properly in a device that can SUSTAIN a write/read speed of 6mb/sec. Where a class 2 card (with the same speed rating) will work in any device that can write at least 2mb/sec or more; and will do so AT THE SAME SPEED AS THE CLASS 6.
Many people believe that the discrepency lies in the branding of the card, for example some say that no-name brands will produce a substandard card and call it a "class 6", which will result in lower transfer speeds. Again, this is not true. The class rating HAS NOTHING TO DO WITH HOW FAST THIS CARD WILL PERFORM. If your device reads/writes at 15mb/sec it will perform the same with a class 2 as it will with a class 6. The only time class ratings matter is if you have a device (usually a digital camera) that writes slower than 6mb/sec- which the G1 does not.
I don't understand why ROM developers (and no disrespect intended, I have an unbelieveable respect for devs) make a notation that HERO ROM's need a class 6 memory card to function. We sell 16gig Sandisk microSD cards with a class 4 rating, and I constantly get customers who tell me they are going to wait for Sandisk's class 6 16gig microSD card. As of today Sandisk has no intention of making a class 6 16gig microSD card. And if they did, it would not be any faster than the class 4 that is currently available.
This is the information I have gathered by speaking to the Sandisk and Delkin engineering departments as well as countless searches, and I hope it saves someone some $$- which is my intent.
hmm.. your post does not quite make sense.. so you say a class 2 card in a G1 performs equally fast as a class 6. And that class rating has nothing to do with card speed....
A bit hard to believe....
ofsinreno said:
I manage a consumer electronics store and a lot of people seem to be misinformed when shopping for memory cards for new mobile devices. After spending a year or so on this site it seems many people here are misinformed as well- so I thought I would open up a discussion.
When looking at memory cards (micro in this case; but most follow the same format) there are 3 important pieces of information to review.
1. Capacity- some people will do fine with a 1gig card while others use their device to store music, movies, and pictures and need more space. At the time of this post the largest micro-SD card available (as far as I know) is 16gig.
2. Speed rating- obviously you want the most performance you can get out of a memory card so any information stored on that card can be accessed quickly, and with so many new ROM's running apps from the SD card the transfer needs to be both fast and efficient. Most cards offer anywhere from 6mb/sec to 15mb/sec (with other types of flash speeds near the 45mb/sec range). The speed rating is a rating of the MAXIMUM READ/WRITE SPEED capabilities, and is often difficult to find on the product info- even more difficult to measure.
3. Class rating- is the most misunderstood rating of all- and the most advertised (the class rating is written on the front of most cards). The class rating IS NOT a measure of how fast information can be accessed from the card by the device. Most people believe that a class 2 card is guaranteed to read/write at 2mb/sec while a class 6 is guaranteed to read/write no slower than 6mb/sec, the next logical step is to believe that a class 6 card will be faster and more efficient than a lower class. THIS IS NOT TRUE. What the class rating is actually defining is whether or not the card will work in your device. A class 6 card will only function properly in a device that can SUSTAIN a write/read speed of 6mb/sec. Where a class 2 card (with the same speed rating) will work in any device that can write at least 2mb/sec or more; and will do so AT THE SAME SPEED AS THE CLASS 6.
Many people believe that the discrepency lies in the branding of the card, for example some say that no-name brands will produce a substandard card and call it a "class 6", which will result in lower transfer speeds. Again, this is not true. The class rating HAS NOTHING TO DO WITH HOW FAST THIS CARD WILL PERFORM. If your device reads/writes at 15mb/sec it will perform the same with a class 2 as it will with a class 6. The only time class ratings matter is if you have a device (usually a digital camera) that writes slower than 6mb/sec- which the G1 does not.
I don't understand why ROM developers (and no disrespect intended, I have an unbelieveable respect for devs) make a notation that HERO ROM's need a class 6 memory card to function. We sell 16gig Sandisk microSD cards with a class 4 rating, and I constantly get customers who tell me they are going to wait for Sandisk's class 6 16gig microSD card. As of today Sandisk has no intention of making a class 6 16gig microSD card. And if they did, it would not be any faster than the class 4 that is currently available.
This is the information I have gathered by speaking to the Sandisk and Delkin engineering departments as well as countless searches, and I hope it saves someone some $$- which is my intent.
Click to expand...
Click to collapse
Sigh... read this.
See how it says the Class Rating is the minimum read/write speed? Crazy that you would say it has nothing to do with speed. One thing though, manufacturers rarely advertise the MAX speed of the cards, which is why some Class 4 cards are equal or greater than some Class 6, also attributed to manufacturers claims of speed not being substantiated.
Insert foot in mouth, walk away.
Wow, so much misinformation there.
http://en.wikipedia.org/wiki/Secure_Digital
SD Cards and SDHC Cards have Speed Class Ratings defined by the SD Association. The SD Speed Class Ratings specify the following minimum write speeds based on "the best fragmented state where no memory unit is occupied"
Edit: Damn, daveid beat me to it.
The minimum write speed that defines the class rating is not the minimum speed the card is guaranteed to read/write, but the minimum speed a device that can be used. If your device only writes at 4mb/sec you must use a class 4 or lower.
http://kb.sandisk.com/app/answers/d...ce between speed and class rating/r_id/101834
ofsinreno said:
The minimum write speed that defines the class rating is not the minimum speed the card is guaranteed to read/write, but the minimum speed a device that can be used. If your device only writes at 4mb/sec you must use a class 4 or lower.
http://kb.sandisk.com/app/answers/d...ce between speed and class rating/r_id/101834
Click to expand...
Click to collapse
If you read the page you quoted, you would understand how you are wrong.
Speed Class is a minimum speed based on a worst case scenario test.
Click to expand...
Click to collapse
Unlike card write speeds that measure maximum performance, class ratings measure the minimum sustained speed required for recording an even rate of video onto the card. The class rating number corresponds to the transfer rate measured in megabytes per second. Class 2 cards are designed for a minimum sustained transfer rate of 2 megabytes per second (MB/s)1, while Class 10 cards are designed for a minimum sustained transfer rate of 10MB/s2.
Click to expand...
Click to collapse
I would read that again if I were you.
It is saying that if you have a camcorder that requires a class 4 card and you put in a class 2, it may not function correctly.
Lower speed card in a camera that requires a higher speed = bad
Higher speed card in a camera that requires a lower speed = good
I know the wording is a bit confusing on this issue. I had to call the tech support line at Sandisk when we first got the 16G class 4 cards myself to find out what the difference was. As a manager it is my responsibility to know what our customers need before issues arise. The explanation I am providing is the explanation I was given by both the tech support associate and the engineer I was later able to speak with. When I called Delkin to ask the same question I was told the same thing. If my information is incorrect I am sorry but it came directly from the horse's mouth.
I posted "A discussion"- at least we have that! I love xda
What you are saying doesn't make any sense. By your logic a class 2 card would actually be better than a class 6. If that was true, why are they cheaper.
ofsinreno said:
I know the wording is a bit confusing on this issue. I had to call the tech support line at Sandisk when we first got the 16G class 4 cards myself to find out what the difference was. As a manager it is my responsibility to know what our customers need before issues arise. The explanation I am providing is the explanation I was given by both the tech support associate and the engineer I was later able to speak with. When I called Delkin to ask the same question I was told the same thing. If my information is incorrect I am sorry but it came directly from the horse's mouth.
I posted "A discussion"- at least we have that! I love xda
Click to expand...
Click to collapse
The problem with your argument is that based on your logic the following scenario would result in poor performance.
Let's just say I have a digicam that can only sustain a max write speed of 6mb/s. I purchase a class 10 card for it (because it is on sale, and has a bigger number).
Based on your explanation, that would result in worse performance than getting a class 6 card, or that it would not work at all.
However, class ratings have nothing to do with the Standard that SD is built on (and MicroSD), this standard requires devices to be compatible (the newer SDHC classification is an extension on the original SD standard that allows for higher capacity, this requires two devices that are SDHC compatible). ANY SD or MicroSD card should be compatible with ANY device that supports SD or MicroSD (respectively, and of course minding the HC requirements if needed).
In fact, the Class 10 card WILL work in a device that can only sustain 6mb/s speeds. Not only will it work, it will work just as well as the Class 6 would. But, it will provide better transfer speeds when utilized in a card reader or other device. Thus, making it the better choice.
ofsinreno said:
I know the wording is a bit confusing on this issue. I had to call the tech support line at Sandisk when we first got the 16G class 4 cards myself to find out what the difference was. As a manager it is my responsibility to know what our customers need before issues arise. The explanation I am providing is the explanation I was given by both the tech support associate and the engineer I was later able to speak with. When I called Delkin to ask the same question I was told the same thing. If my information is incorrect I am sorry but it came directly from the horse's mouth.
I posted "A discussion"- at least we have that! I love xda
Click to expand...
Click to collapse
So very generally (this doesn't apply to all cards, but probably a majority of them.) A Class 4, 100x card (if such a card existed) would probably sustained write to the card at 5MB/s and sustained read from the card at about 14MB/s. While a Class 6, 66x card would probably sustained write to the card at around 7MB/s and sustained read from the card at around 9MB/s. I can make this generalization because most of the time (not always though) reading from a microSDHC card is faster than writing.
But here is the kicker, a class 6 SDHC card is the maximum class at this time. Some class 6 cards could actually be "Class 10" if it existed. My class 6 SanDisk 8G would be one of these cards. I have benchmarked it at a sustained ~14MB/s write and ~20MB/s read. So that is why people are waiting for SanDisk Class 6 cards. Because generally, SanDisk class 6 cards are a lot higher spec than they need to be in order to satisfy the current class ratings.
However like daveid said, the speed ratings are rarely put on SDHC cards. Only class ratings.
So, I said all of that to say this. If I needed a card for my camera (which the write speed is important,) I would pick the class 6 card in the example. If I needed a card for my music player for my truck (in which read times are the most important) I would get the class 4 in the example above.
However, in the real world, since the X rating is rarely specified, I would play it safe and get the class 6 rated card in both examples.
t1n0m3n said:
So very generally (this doesn't apply to all cards, but probably a majority of them.) A Class 4, 100x card (if such a card existed) would probably sustained write to the card at 5MB/s and sustained read from the card at about 14MB/s. While a Class 6, 66x card would probably sustained write to the card at around 7MB/s and sustained read from the card at around 9MB/s. I can make this generalization because most of the time (not always though) reading from a microSDHC card is faster than writing.
But here is the kicker, a class 6 SDHC card is the maximum class at this time. Some class 6 cards could actually be "Class 10" if it existed. My class 6 SanDisk 8G would be one of these cards. I have benchmarked it at a sustained ~14MB/s write and ~20MB/s read. So that is why people are waiting for SanDisk Class 6 cards. Because generally, SanDisk class 6 cards are a lot higher spec than they need to be in order to satisfy the current class ratings.
However like daveid said, the speed ratings are rarely put on SDHC cards. Only class ratings.
So, I said all of that to say this. If I needed a card for my camera (which the write speed is important,) I would pick the class 6 card in the example. If I needed a card for my music player for my truck (in which read times are the most important) I would get the class 4 in the example above.
However, in the real world, since the X rating is rarely specified, I would play it safe and get the class 6 rated card in both examples.
Click to expand...
Click to collapse
I've got the same Sandisk card they're freakin BEAST!!! speed ratings over class ratings seriously. oh wait they have money to make
OK, I don't mind admitting that my foot often finds its way to my mouth. I logged onto a training site we use at work and found this:
"Read/Write speed is the maximum sequential speed that data can be written to the memory card ("write speed") and transferred to a host device ("read speed")."
and this
"Speed class is not a measure of the top sustained speed of an SD/SDHC memory card. The current SD/SDHC memory card speed classes are generally rated as class 2, class 4, or class 6. "
and this
"Usually standard definition camcorders require only a Speed Class 2 rating
Generally standard definition camcorders will not benefit by using higher class 4 or above memory card products
and this
"Maximum read / write speed (MB/sec), not class speed, is the critical number for you and your customers who want to take photos"
Taking the information given to me by the company representatives and applying this Sandisk Training information I came up with the information I posted earlier. And I thought that people were being misled into spending more $$ than necessary.
Thanks for the discussion, now I understand
It is great to help people reach a higher understanding of things!
And I am glad you saw our input as that, instead of getting hurt feelings like some people do.
I'm sorry I'm so late to this conversation, but is there anything wrong with getting a class 10 mSDHC card that is going to be partitioned? I wouldn't think so... but I wouldn't want to spend the money and realize that the ext partitions do not work with a class 10 card. Has anyone tried this? Results? Noticeable performance shift?
Jeliz187 said:
I'm sorry I'm so late to this conversation, but is there anything wrong with getting a class 10 mSDHC card that is going to be partitioned? I wouldn't think so... but I wouldn't want to spend the money and realize that the ext partitions do not work with a class 10 card. Has anyone tried this? Results? Noticeable performance shift?
Click to expand...
Click to collapse
lol^^ i was about to ask the same exact thing....cus I got my eye on the new Kingston 10 class 16gb card right now...but haven't heard too much talk about it, so I figured I'd wait until more people purchase and give feedback before I spend that $100.
also, has anyone ever used a "Centon" sdcard? Unfamiliar name to me, I usually buy Sandisk or Transcend.....but I took a risk and purchased a 16gb Class 6 Centon sdcard yesterday in TigerDirect. Cost me $74! Have not opened it yet, and I still have the receipt....any suggestions?
Personally I would wait until "Class 10" becomes an official SD Association speed class. You never know, they may spec other classes like "Class 12" or "Class 14" at that time as well. However, for the G1, you will probably not get any performance increase over a Class 6. A fast Class 6 pretty much maxes out the G1's capabilities as of right now.
So unless you are getting the new card to put into an adapter and push large file directly to the card (bypassing the G1) I would hold off getting the expensive "Class 10" card until more info is given. (I.E. an official SD Card Specification Ver.3.0 is released.)
hi, I have a question related with the SD card. I also have a Class 6 8G card, but I can't use adaptor to read it on my card reader. The card reader is a bit old. It's a kind of 6-in-1 reader and I usually read my CF card from DSLR camera on it and till now it's working fine. However, ever since I purchased this microSD card, I can't read it on the card reader. everytime I put it into the adapter and inserted it in the card reader, it will cause the card reader malfunction. nothing can be read and the LED on the reader just die.
Is it because the reader can't support it or the adapter can't? I can only use the phone to read the card now.
zhourj said:
hi, I have a question related with the SD card. I also have a Class 6 8G card, but I can't use adaptor to read it on my card reader. The card reader is a bit old. It's a kind of 6-in-1 reader and I usually read my CF card from DSLR camera on it and till now it's working fine. However, ever since I purchased this microSD card, I can't read it on the card reader. everytime I put it into the adapter and inserted it in the card reader, it will cause the card reader malfunction. nothing can be read and the LED on the reader just die.
Is it because the reader can't support it or the adapter can't? I can only use the phone to read the card now.
Click to expand...
Click to collapse
Do you have it partitioned with an ext file system? If so then windows has a hard time recognizing this. Its better to just mount your mSDHC from your phone instead of trying to mount it through a card reader.
yes, I did have ext file system on it , but also fat 32. I got another newer reader and it can read the fat 32 partition. I think the other one just being too old and can't read the sdhc card . it's too large for it.
Guys, there are Micro SD and Micro SDHC cards. Which one of these will work in Atrix? And what class card should I get so I would not have any issues HD recording?
Thanks
I installed a Micro SDHC of 32 GB and worked fine
both will work, 4GB and above are always microSDHC.
class 6 or higher but even then some cards are faster than others. Some are optimized to deal with small files fast, while others that do well with large files, suck with small.
read reviews somewhere like newegg and take them all with a pinch of salt. Generally you get what you pay for and a company that has a warranty in your country is worth a lot if you have to return it.
What about the 8gb SD that came out the evo can u use that
Edit I looked u can nvm thanks tho
Sent from my SPH-D700 using Tapatalk
Class info...
Did the class of the sdhc card will affect performance of the Atrix... I know the higher class the best performance you have... but for the Atrix which Class do you recommand to not affect performance of the phone?
Go with a class 10, if you can afford it.
micro sd card
I am using a 32gb class 10 parrot micro sd card
The higher the class the faster the transfer rate. I get about 10-15mbs/sec transfer rate
Do keep in mind that you shouldn't be cheap by purchasing the micro sd card online for many reasons such as it can be fake, doesn't have the full potential memory, or data can be wiped once you almost exceed memory capacity, Some can also cause viruses
What class will I need for 1080p? I would rather buy a class 6(im cheap), cause a class 10 32Gb is like 100 bucks. That's 66% the cost of this phone!
Sent from my MB860 using XDA App
I'm using a 4GB SDHC Class 2 from my old G1. I noticed when moving data from the internal 10.71GB I get at least 5-5.5 MB/s write and 10-15 MB/s read when dealing with large (350MB - 1.2GB files)
Using the 1080p Camera hack in Gingerblur 3.5, I've shot 7 sec 1080p 23.265fps video to the 4GB SDHC without issue. According to MediaInfo the Video is 11.7Mbps 1920*1088 (16:9), at 23.265 fps, AVC ([email protected])(1 Ref Frames). The 720p video it shoots is 11.8 Mbps.
Regardless of fps, the bitrate is 11.7 megabits per second which is 1.4625 megabytes per second.
So basically class 2 micro sd(hc) is good enough.
__________________
Motorola Atrix 4G (Gingerblur 3.5)
So I ended up ordered a 32gb micro SD card off amazon without realizing the class until yesterday and it was too late to ship it. So I come here asking should this be okay for my TF?
I know the speeds will be slow but if that's all it is I can deal with it. My main concern is I have a lot of 720p & 1080p videos and I don't want them to lag. Will there be any lag when using this card, or should I just go ahead and return it?
Let me know if this has been asked or is in the wrong section. Thanks
That class doesnt have anything to do with read speed, only write speed. So a class two *should* be slower to write videos to it than a class four but read wise both should be much faster. Of course the actual speeds can vary by maker.
So, yes, a class two will be fine for playing HD video.
I've been using good quality (Sandisk) microSD cards Android devices for a long time now and *never* had an issue with them.
Remember the following:
1. The class of an SD card doesn't tell you how fast it is - it only really tells you how slow it isn't!
2. It only tells you the minimum sustained write speed in optimal conditions (i.e. unfragmented), and nothing about read speeds at all.
3. Good quality lower "class" cards can often exceed the class minimums for higher classes anyway. For example, I've several 16gb Class 2 Sandisk microSDs and in my testing can regularly achieve write speeds of 7MB/s with all of them.
Regards,
Dave
Cool, thanks a lot! If I ever get tired of the write speed I'll just grab another one later on down the line. Thanks again
Just to add my voice in agreement with the above posts:
Class 2 Sandisk cards are fine, even for 1080p files.
There is a lot of misinformation out there regarding Class speeds on microSD cards.
I've watched a 1080p high profile MKV with a video bitrate of 9500kbps on my Galaxy SII on a Class 2 card, no problems.
Heres my video showing exactly that:
Yep I've used C2 Sandisk and PNY cards without any problems.
I am going to buy the 32 gb Prime (with keyboard) and have been researching memory card options. I am leaning towards the following:
1. Lexar High Speed microsd 32gb Class 10 (for the device)
2. Sandisk Extreme SDHC 32gb class 10 (for the docking station)
I will use this to watch movies, play music, surf the web, take notes, use apps, and play emulators.
My only concern is I've heard the class 10's have trouble with speeds on smaller files/apps/programs. Will that be an issue? Or will these two cards be a good setup?
Pretty much everything will be "slow" on working with smaller files / programs due to file system overhead.
Doesn't matter if it's a class 2/4/10/1,000.
John Kotches said:
Pretty much everything will be "slow" on working with smaller files / programs due to file system overhead.
Doesn't matter if it's a class 2/4/10/1,000.
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I've read similar things as well. You will truly be fine if you just get a Class 4 and save the money.
irishtexmex said:
I've read similar things as well. You will truly be fine if you just get a Class 4 and save the money.
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with smaller files (a few data blocks in size) you have as many writes to the file system management space as you do data block writes.
with large files there are much fewer writes proportionately which is why large files have higher throughput.
Sent from my MB855 using Tapatalk
I went with a 32gb class 10 pny micro sd from newegg. It was 47.99 and I finally tested it last week. Wrote video/music files at 11.5-12mb/sec. Some of the other class 10s had reviews claiming they only wrote at class 4 speeds. I can't stand how slow my class 4 16gb in my phone us...
Hey cyi1 is there a chance you would mind testing the write speed using your phones sd card too just to get a view of the speed difference from class 10-4?
Thanks in advance if you can. I'm sitting here trying to decide whether I get the 32gb class 4 or the 16gb class 10 as they are about the same respective price here.
distho said:
Hey cyi1 is there a chance you would mind testing the write speed using your phones sd card too just to get a view of the speed difference from class 10-4?
Thanks in advance if you can. I'm sitting here trying to decide whether I get the 32gb class 4 or the 16gb class 10 as they are about the same respective price here.
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I second that, would like to know this aswell. please let us know.
You might want to give this a read.
I'd also suggest getting SD cards from a source with a good exchange policy. The speeds can fluctuate wildly within a class and even from idenetical cards from the same manufacturer.
So, what ever cards you get, test them and if not-acceptable, exchange them.
I stated this in the "Ultimate Accessory" thread. But I'm going to say it here to.
Don't buy the Patriot MicroSD 32GB Class 10. It's awful and I'm not the only one stating this. It used to be $100+ (I bought it when it first came out), but now it's like $40 because people realized how crappy they are. Speed throughput was never the problem, but they randomly corrupt and when it DOES happen, it's bad. Mine corrupted on me 3 times in only a few months. Each time I was lucky to have had a backup (Ti Media Sync) and managed to save just about everything. The first time I lost a lot of pictures that hadn't backed up yet.
Anyway, the corruption doesn't come from using USB or anything. Everytime mine randomly corrupted, I was using it away from a computer or charger. First time I was watching a video off the card (admittedly porn) and the second time I was taking a picture. Third time I don't know because the phone was in my pocket in standby and when I pulled my phone out to show someone a pic from the phone it wasn't there, along with the rest of the stuff that was on the SD. Oh, and the first time this happened was on my Nexus One, not my Sensation.
Anyway, I replaced it with the Samsung 32GB Class 10 (bought it for just over $80) and it's been rock solid so far (2 months in). Speeds are pretty much identical to the Patriots. I use "Boot Manager" and dual boot a couple different ROMs off it, and they all fly.
Just wanted to give you guys a heads up.
I went "cheap" on a class 4 Transcend 32GB for both my photon and my upcoming Transformer Prime.
In actual copies, I was seeing in the 6-7 MB range so I won't complain.
I purchased the ADATA 32GB Class 10 from NewEgg and it works wonderfully. I haven't done any testing beyond copying 4GB of video files to it, which copied at a rock solid 17MB/s! I'm impressed needless to say.
Model AUSDH32GCL10-RA1
Could you run a crystalmark benchmark on your card(s).
If the transcend random 4k R/W speeds are decent, that may be the ticket for me.
Thanks
curreyr:
i can, but I won't get to this until Sunday when i get home.
6mb/second was not on random writes, it was on bulk copies of mp3 files for the phone
Sent from my MB855 using Tapatalk
no problem, and no real hurry (since like others in the holding pattern to actually get a prime).
My wife's xmas gift of a new camera is getting a SanDisk 32gb class 10 "extreme" (SDSDRX3-032G-A21) that I plan on running crystalmark tests on next week.
I might even hold off getting a micro sd until 64gb cards drop closer to $100 ... (e.g SDSDQY-064G-A11A might be killer at ~$100)
curreyr said:
Could you run a crystalmark benchmark on your card(s).
If the transcend random 4k R/W speeds are decent, that may be the ticket for me.
Thanks
Click to expand...
Click to collapse
Attached are the results... It's just under 5 in sequential mode...
I was also wondering this. Will there be any difference in watching a video file (1080p) between class 4 or 10?
Large video files will be skewed towards the sequential mode -- which tested @ 20MB per second. That's 160Mbits / second.
In theory, this class 4 card could playback a maximum bit-rate blu-ray iso without a problem. Blu-ray maximum bit rate is 48 Mbits (or 6 MBytes) / second.
Regards,
Class 4 vs 10
Unless you are recording HD video to the SD card, class 10 is a BIG waste of money. The class only refers to the write speed, NOT the read speed. If you are just loading videos or music onto the SD card, then even class 2 will be fine. It may take you longer to load the original files to the card, but it is NOT going to be slower in reading the data compared to class 10.
These class ratings are really needed for HD video camcorders and high FPS (frame per second) cameras that demand high bit rate & speeds. I use a 6 for 720p video on my nikon dslr and for 4-6 fps 14 megapixel shots, but class 2/4 for my phone/tablets where it is just used to store movies, songs, pictures, etc...
I just picked up 2 Samsung class 10 32gb Sd cards from fry for $35 a piece. I think it was a wise decision and will help me out in the future. I know it's overkill but I think for that price it was worth it. So now my Prime will have 96gb of storage when I hook up my dock. That is truly overkill as well, but who knows when I might need all of it lol.
After a huge thread I read here about classes, I changed my mind and went with a class 4 for the Prime (was thinking I mist get a class 10). I picked a Transcend 32gb class 4 off of Amazon for $33 delivered.