Hello everybody,
So the thing is I want to buy another sdhc for the Streak (8/16 gb) but I want to know which class to buy. With sdtools I have an average of the the following ratings with a Sandisk 16gb class 2:
Writing speed: between 5.3 / 6.4 mb/s
reading speed: 12.3 / 17.2 mb/s
1. Does a class 6 or 10 will increase the overall speed? (I know 6/10 = minimum speed)
2. Are micro sd's from brands like Adata or Transcend also reliable in class 6/10?
3. Does the streak support class 10 and is it necessary or will be a class 6 enough?
Thanks!
Ruben
For my internal memory I'm using a Patriot LX 4gb class 10 and for my external memory the best card I have found is the adata class 10 16gb...
Those are the ones that IIIIIIIII use.... but others may recommend otherwise
Some benchnarks have shown that burst read write speeds on lower class cards are higher while the class 10 cards are better only for sustained reading and writing... such as restoring a nandroid and creating a nandroid...
I still use the class 10s
Awesome, thanks! Can you maybe post your reading / writing speed with the external card in the device (sdtools or another app).
I've read that Sandisk class 4 cards perform better at random access speed but I'm also really curious if a higher class card will go over 13/15 mb writing speed, because with a class 4 sandisk (4gb) I did get a constant rating around w9/r20 mb/s
Related
Im buying a newer memory card for my phone ..
ill choose between:
Transcend 4 GB Class 6 microSDHC Flash Memory Card TS4GUSDHC6
A-DATA Turbo 4 GB Class 6 microSDHC Flash Memory Card
All i need is 4GB i wont store music or anything ...i wanna know will higher capacity be (by any means) faster than lowr ..? ..i mean shud i get 8GB? will it make it faster?
in theory they should have almost identical speed. class only determines minimal write speed (class 6 = 6 MB/s) but it can be even doubled. it depends how lucky you are
edit: here you go http://en.wikipedia.org/wiki/Secure_Digital#SD_Speed_Class_Ratings
Another note, cheap cards (or nameless) even at class 6 will almost always be slower than a card from a good brand
So i'm looking for a new Class 6 8gb SD card to replace my sandisk class 2 8gb sd.
In your opinion, what brand is best to go to, Transcend or Sandisk?
or any other brand, I would like to see options. What brand runs best with apps2sd and linux-swap? I'm currently using enomther's AOSP extpansion pack rom, but i'm thinking about moving to a HTC Hero rom, thus why I need a class 6 sdcard.
Does it really increase the overall speed of a rom?
So, in your honest opinion, which brand should I go to? Links will be appreciated, and I like amazon =D
Sandisk or A-data sd cards are the best.
Class 6 is hellofalot faster then class 2, i only have a class for now since i lost my 8gb.But you should get either one of those maybe transend if its cheaper.
I like my Transcend 8gb Class 6....just wish I could find a 8GB Class 8 or 16GB Class 10.
This is my SD card and it runs lightning fast.
.
blackknightavalon said:
This is my SD card and it runs lightning fast.
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I'm definitely going to give this a try, thanks for the help
jaboswell said:
I like my Transcend 8gb Class 6....just wish I could find a 8GB Class 8 or 16GB Class 10.
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Don't worry phones typically downclock the reader slot to keep battery consumption at a minimum. If you ask anyone to compare a 8gig class 6 vs a 16gig class 6 they will tell you the 8 gig is much faster then the 16. It's because the bigger card needs more voltage to get to the same speed as the 8 gig card due to it's more condensed package. Also this is to allow for less heat issues cause of course more voltage to the card slot means more heat.
psychoace said:
Don't worry phones typically downclock the reader slot to keep battery consumption at a minimum. If you ask anyone to compare a 8gig class 6 vs a 16gig class 6 they will tell you the 8 gig is much faster then the 16. It's because the bigger card needs more voltage to get to the same speed as the 8 gig card due to it's more condensed package. Also this is to allow for less heat issues cause of course more voltage to the card slot means more heat.
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so does that mean (in theory) that a 32gb would be super dooper slow? For linux-swap and such?
I'e never had any problems with transcend. I got my 8GB class 6 from Amazon for £14
So here is the question.Untill what speed can the cardreader of the Hero support?Class 2,4 or 6?Is there any point on getting a card above lvl2 for a phone anyway?I mean right now i have the default card on it and still i can see movies,photos play music etc pretty good without problems.Why should i choose class 4 or even class 6?
At the moment i found class 2 micro SD 16 giga for 25 euro and class 6 8giga for 19-20.Which should i pick?I am pretty sure that i can use even 16giga of data space but i am not sure if i can use higher speed rates than class 2.
You can choose any class of SD card you want, but the class 6 is faster and gives better performance. Trancend also have a 16GB class 6 card.
well i know that class 6 is faster.What i ask is if Hero can handle the speed or Class 4 or Class 6 and if there will be any real diference in performance.If yes in what application, since music , pics or even movies play good enouph in even class 2 cards.
You will notice it if you use Apps2SD and have a swap partition on your SD-card. Otherwise you won't notice the difference I guess.
Ludolf71 said:
You can choose any class of SD card you want, but the class 6 is faster and gives better performance. Trancend also have a 16GB class 6 card.
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This is a common misconception. A class 6 card is not necessarily faster than a class 2 card, because all that the class signifies is the *minimum* guaranteed sustained speed that a card can be written at.
It is perfectly possible for a class 2 card to outperform the minimums required for a class 6 card, so that a good quality class 2 card can be faster than a poor quality class 6 card.
My advice when buying an SD card is to look for independent reviews where the actual speeds are tested. For example, see here.
Regards,
Dave
foxmeister said:
This is a common misconception. A class 6 card is not necessarily faster than a class 2 card, because all that the class signifies is the *minimum* guaranteed sustained speed that a card can be written at.
It is perfectly possible for a class 2 card to outperform the minimums required for a class 6 card, so that a good quality class 2 card can be faster than a poor quality class 6 card.
My advice when buying an SD card is to look for independent reviews where the actual speeds are tested. For example, see here.
Regards,
Dave
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Very interesting
A friend of mine just bought a Galaxy SII and wants to know if it's worth getting a class 10 card. Can the phone write to the SD at that speed. What is the maximum speed the phone can write to the card at?
The question is what you are planning to do with your phone to make use of such a high speed.
Class 4 means a writing-speed of at least 4MB/s. Even ignoring the fact that most cards can write significant faster in reality than their Class indicates, there is nothing you can really do with a phone to use this speed.
The fastest writing-speed you will need is when recording movies, and the highest bitrate the default camera uses is 17MBit/s.
With a Class 4 card you can record at least 32MBit/s.
Of course you can transfer your media faster on your card, if the writing-speed is higher, but how important is that?
It is a good point put forward by the poster above.
I have a class 10 card and it only comes in handy when transferring files to and from the card. Transfer speed is about 14MB/s with a patriot clss 10 16 GB from my experience so appears to be limited by the speed of the card. And writing is over 10MB/s which the class 10 part defines.
I'm confused on the Class rating for SD cards. I understand it to be a write-speed rating, and in my usage I'm more concerned with read throughput. My goal is to watch 480p and 720p content without jitters, and I'm not sure if the higher class matters or not for reads.
Thanks!
The write speed is going to be the same as the read speed. With flash memory fragmentation doesn't effect read speed much because of the low access time. With writing the card has to find an empty cell and write which could effect the writing performance. The class signifies that under heavy fragmentation the card should write at the speed of the class (i.e. class 10 should be 10 Mb/s). Also, regardless of fragmentation the card should read at the speed of the class. So in your case if your not needing high speed write then a class 2 or 4 should be fine. I personally wouldn't go below 4 because you never know if you might need the extra speed later.
Looking at Wikipedia the class is both Read & Write.
I personally use class 4 16GB cards and they seem to do the job fine on the re-encoded 1080/720 content I have on them.
I have a Class 10 Patriot Micro SDHC card and it works fine. I also tested with a Patriot SDHC (full size) in the sock and works fine. Both tested with 720p H264 MOV.
Heh I would be worried if a class 10 (being the fastest you can get) was having issues
Sent from my Transformer TF101 using Tapatalk
a class 10 is perfect for anything and ull only spend another maybe 10then a class 4. i only get class 10s or higher for my phones and cameras just in case i need the extra power
Sent from my PC36100 using Tapatalk
Full size SD's are pretty similar in price between classes but microSD's are insanely different... £17 for a class4 16GB or £40 for class10
alex5790 said:
The write speed is going to be the same as the read speed. With flash memory fragmentation doesn't effect read speed much because of the low access time. With writing the card has to find an empty cell and write which could effect the writing performance. The class signifies that under heavy fragmentation the card should write at the speed of the class (i.e. class 10 should be 10 Mb/s). Also, regardless of fragmentation the card should read at the speed of the class. So in your case if your not needing high speed write then a class 2 or 4 should be fine. I personally wouldn't go below 4 because you never know if you might need the extra speed later.
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No. The class is the garunteed write speed, the read speed has no relation and can vary from card to card. I am using one of two cards in my tab, one a class 4 and the other a class 2 and neither have ever come close to having an issue streaming. The class 4 can read at over 16mb/s, Ive tested it.
The only reason to pay for a C6 or higher card is because you need to push data to it quickly., like recording video.
ryan stewart said:
No. The class is the garunteed write speed, the read speed has no relation and can vary from card to card. I am using one of two cards in my tab, one a class 4 and the other a class 2 and neither have ever come close to having an issue streaming. The class 4 can read at over 16mb/s, Ive tested it.
The only reason to pay for a C6 or higher card is because you need to push data to it quickly., like recording video.
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+1. This is the correct answer. Good cards typically read much faster than the write speed.
Read speed is not correlated to the write speed or class rating at all...and in most cases, it's way higher than the write speed...
so theoretically even a class 1 card (if you can find one) is able to stream 720P content without much issues..but it will take forever to copy the content onto the card.
my class 10 card reads over 30MB/s and my class 4 does around 16MB/s
What card do you have? I was looking into getting one.