I originally had an 8gb class 4 card and when transferring files between my Nexus and PC I noted speeds of up to around 3mb per second.
I recently invested in a 16gb class 6, but now when I transfer files I am very lucky to even reach 1mb per second. This card is incredibly slow, is this right? I thought class 6 were supposed to be at around 6mb's per second?
strange that the speed is less that the class 4 sd, but u cud confirm the card transfer speed using a card reader
but in any case, you shud note that the phone limits the transfer speeds so u mite never get the full transfer speed of a class 6 card...
Oh, I did not know that the phone would limit the speeds, still, it does seem strange that the speed is less than my class 4.
I shall do what you suggested and try and get hold of an adapter to use my card reader
dannstarr said:
I originally had an 8gb class 4 card and when transferring files between my Nexus and PC I noted speeds of up to around 3mb per second.
I recently invested in a 16gb class 6, but now when I transfer files I am very lucky to even reach 1mb per second. This card is incredibly slow, is this right? I thought class 6 were supposed to be at around 6mb's per second?
Click to expand...
Click to collapse
Where did you buy this card from. If it was off ebay, then it could be a fake & that would explain the 1mb transfer speed.
I recently bought a Kingmax 16GB Class6 microSD card. While I was initially transferring my files from my Sandisk 8GB Class2 microSD card, I noticed that the transfer rate was kind of slow, so I decided to do some benchmarking.
Software: CrystalDiskMark 3.0
3 different microSD cards using same USB card reader
Card #1 - Sandisk 8GB C2
Card #2 - Kingston 8GB C4
Card #3 - Kingmax 16GB C6 (new one that I just bought)
Here are the results (Seq Read; Seq Write; Random Read; Random Write):
Card #1: 17.08MB/s; 5.13MB/s; 17.09MB/s; 1.05MB/s
Card #2: 17.23MB/s; 9.53MB/s; 17.23MB/s; 1.92MB/s
Card #3: 16.05MB/s; 5.22MB/s; 16.73MB/s; 1.02MB/s
Summary: My new Class6 card was about the same speed as my Class2 card.
I approached the vendor and they tested a few other Kingmax card that they had in stock... all cards were reportedly about the same speed as the one they sent me. They swear that it's not fake. Maybe its a bad batch of cards but somthing is weird/wrong. Anyways... I'm sending my card back for a refund. I am going to stick to my Kingston Class4 card now.
1MB/sec can be indicative of USB 1 speeds, is OP sure that its connecting @ USB 2?
The class is supposed to be the minimum write speed, and I assume that to be sequential.
>Kingston
isn't that ring the bell? I mean they are pretty expensive....
I think if you go beyond certain level of quility, the pay off of such c/p ratio will get narrowed and you can't tell difference......
either go dirt cheap or go super HD expensive, middle is kind of "uh they are more expensive than dirt cheap but not even close to those expensive things....."
like my AMD vs INTEL war, cheapest AMD almost always beat middle/low Intel by cost + performance, or just go get best INTEL and enjoy the hell out of it.
happy new year
Related
Hi
I bought a Kingston 8GB SDHC Class 4 card today, I used a Class 2 before, anyway, I copied a lot of music (about 4GB) to the card from the computer but I don't even get close to 4MB/s only 1.38MB/s, have I done something wrong or is it a problem with the card?
thanks
If you're copying file to your phone over usb it will be capped at 2MB/s. It's the phone's fault, not your card. I bought a 16gb class 6 without knowing this and now I have to take my memory card out if I want to take advantage of the write speeds.
Gille1 said:
Hi
I bought a Kingston 8GB SDHC Class 4 card today, I used a Class 2 before, anyway, I copied a lot of music (about 4GB) to the card from the computer but I don't even get close to 4MB/s only 1.38MB/s, have I done something wrong or is it a problem with the card?
thanks
Click to expand...
Click to collapse
You may have been scammed. To know for sure, you should run the h2testw program against the new card. It's quite common for scammers to pass off 2GB cards as 8, 16, or even 32GBs. They can program the card to tell your PC that they are bigger than they actually are.
The h2testw script can test this by writing 8 1GB files (approximately) to your card.
Good luck!
Hello!
I bought Kingston 16gb class 10 micro sdhc card and I tested it on my nexus one getting result 6mb/s and in unbutu getting same results. Both was directly pluged (Not Usb). I closed every running application in nexus one and I got same result. I also tested in different partitions and in ext2 I was getting little slower result than in fat32. But both were same or under 6mb.
Is there something wrong with the card or is it issue with nexus one that android 2.2 doesnt support class 10?
elkyur said:
Hello!
I bought Kingston 16gb class 10 micro sdhc card and I tested it on my nexus one getting result 6mb/s and in unbutu getting same results. Both was directly pluged (Not Usb). I closed every running application in nexus one and I got same result. I also tested in different partitions and in ext2 I was getting little slower result than in fat32. But both were same or under 6mb.
Is there something wrong with the card or is it issue with nexus one that android 2.2 doesnt support class 10?
Click to expand...
Click to collapse
please include where it was purchased, how much, and if there are any serial numbers/stamps on the card. there are known fakes in circulation (even brick and mortor retailers) fyi.
http://www.verkkokauppa.com/popups/prodinfo.php?id=1244 , bought for 101 euros. Serial in the card: SDC10/16GB N0206-001.AD00lF Taiwan.
ANd on adapter reads CHINA
wow thats really slow i have a 16Gb class 4 and i get 7 ~ 8 mb write speeds when the card is in N1 and connected with usb.
I would assume it's the card because as I and someone else stated above, get higher speeds with a lower class card.
As stated here:
It's my understanding that the "Class" simply refers to speed rating and thus should not effect compatibility. As long as the card supports the microSDHC standard and isn't any larger than 32gb it should work. You should also note however that in the past, vendors have claimed a higher class rating when the card did not actual perform that fast. I suggest buying from a trusted vendor with a good name.
32GB SD Card
Anyone tested the 32GB card, I know it's only class 2....
Android Class 10, SDHC3.0 compliant ?
elkyur said:
Hello!
I bought Kingston 16gb class 10 micro sdhc card and I tested it on my nexus one getting result 6mb/s and in unbutu getting same results. Both was directly pluged (Not Usb). I closed every running application in nexus one and I got same result. I also tested in different partitions and in ext2 I was getting little slower result than in fat32. But both were same or under 6mb.
Is there something wrong with the card or is it issue with nexus one that android 2.2 doesnt support class 10?
Click to expand...
Click to collapse
Class 10 should be supported, but they are usually SDHC3.0 card which is new I think...
I have a kingston class 10 as well, same issue, read speed is good but write speed is rated as 2gb, I tried to change the sector size to 4k and still the same.
For those thinking it's a fake card it is not! when I place the card in an adaptor I do 10MB write and close to 16MB read so this is a class 10.
I am not sure if it's the SDC tester app that is wrong or the phone
but since the phone behave fairly well compared to my class 4 card it could be the application. I will do some internal transfer tomorrow to see how fast they go
me too
P00r said:
Class 10 should be supported, but they are usually SDHC3.0 card which is new I think...
I have a kingston class 10 as well, same issue, read speed is good but write speed is rated as 2gb
Click to expand...
Click to collapse
Same card on my HTC Desire... same results... only 2mb/s write beside 15Mb/s read
gary.lavin said:
Anyone tested the 32GB card, I know it's only class 2....
Click to expand...
Click to collapse
See my comparison of Sandisk 16Gb vs Kingstonm 32Gb Class 4 card :-(
http://forum.xda-developers.com/showthread.php?t=830087
I just saw your thread in this forum after I posted mine in the other
Sorry
G.
Hi guys ... So recently I purchased this 16 GB micro SDHC card for my new Android phone:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820220524
The problem is that I'm not getting the 4 MB/sec write rate that this card promises ... I tried low level formatting it with this tool:
http://hddguru.com/software/2006.04.12-HDD-Low-Level-Format-Tool/
.... but the write-rate is still the same .. Both before and after trying to low level format the card, I'm getting a write-rate of about 0.9 MB/sec ~ 1.0 MB/sec ...
Other people who have purchased this card from Newegg have said in their feedback that they can at least achieve 3 MB/sec or something, and I'm not even close to that .. Am I doing something wrong ?
It depends on what the card is being used on. With a cheap multi card reader, you're going tto get low speeds. I get around 5 when it is plugged into my phone.
Captivate 2.2.1 OCed
Atrix Root
Nexus 1 2.3.3
WELL,you mean you get only 0.9MB/S to 1.0MB/S with your micro SDHC card plugged into a card reader?if so ,just read the guy above,it is almost the reason .if not maybe it's inferior,you should ask NEWEGG for service...
What are you using to benchmark it? And what hardware are you putting it into (what he said)?
I have a class 6 8GB. On my Android I used an app called SD Tools and another called Antutu System Benchmark on my card as-is (not freshly formatted.) I get around 5MB/s write and 11MB/s read. (Appbrain has the apps.)
Tonight I used HD Tune Pro on my PC (trialware) through a USB adapter. I got better results on the PC. I have noticed that the software makes a big difference. HD Tune seems to be the most respected on the net. I got 12.3MB/s read min -- 14.3MB/s max. Write was around 6 min/8 max in the File Benchmark tab (didn't want to reformat my card to test write speeds.)
Use a high quality reader. I don't know the specs on these but mine boots Linux and Windows OK and always tests at max speeds with my cards. It is a full-sized USB stick reader with a mini-sd adapter.
Update: I got very different results when the cards were formatted by different systems though. My class 2 card formatted with Nokia phone got 18MB/s read, but my class 4 formatted by my PC for booting got 6MB/s min and 14 max. All with HD tune in same card reader. All fat32. WTF??
I wonder if these programs are testing the first partition, which would be the boot partition on my class 2 card. Something strange going on.
I'm using the microSD -> SD adapter which came with the microSD card itself, and then putting this SD adapter into my laptops builtin card reader ... Is there any problem with this setup ?
Any hints on this people ?
Hi guys
i recently received my Sandisk Class 4 16gb micro sd card, but im getting pretty slow speeds with it.
Its currently in FAT32 format.
When transferring files from my computer to the card via the usb cable, im getting 3mbps, which is much slower than what ive seen others get with a class 2 sandisk microsd card.
Also when i test the card using 'SD tools' in the app market it says it should have write 5.7, read 10.4, which is not what im getting and still slower than results ive seen others get with class 2 sandisk microsd cards.
I also have an old 2gb Verbatim card (with no class markings), which is currently in FAT format (not FAT32), that came free with an old phone, that seems very quick when transferring files, much quicker, and in SD Tools it gets - write speed 2mbs, read speed 17 mbps.
Questions -
What format should i set the card to maximize performance (not using app2sd)?
Is a smaller capacity card of the same class faster?
(is a class 4 8gb faster than class 4 16 gb?)
Is FAT faster than FAT32?
Is my card defective?
Should i return it for a class 2 as they seem to be faster?
Hope you can help
For starters, which of those 2 file system is really faster don't matter because you cannot use FAT16 on your 16GB card. FAT16 only supports up to 2GB.
Also, class 4 is suppose to be faster than class 2.
sounds like you got a fake Sandisk Class 4 16gb, a knockoff market imitation with low quality component
what is the actual speed test result of the write?
AllGamer said:
sounds like you got a fake Sandisk Class 4 16gb, a knockoff market imitation with low quality component
what is the actual speed test result of the write?
Click to expand...
Click to collapse
Thanks for the reply allgamer, I've seen many of your posts on these boards and your very helpful
My actual write speeds are 3mbps, when transferring from my pc to the phone via usb cable.
I got the card from play.com so I didn't expect it to be fake. Are there any other tests I could do to confirm its authenticity?
Should I try different file systems like ext2 or fat etc?
3MB/s for a class 2 card is pretty good. I don't what you can expect more from that.
I have an Kingston 16Gb Class 4 and the writing speed from pc -> phone is like 2MB/s, much slower then it should. But in SD Tools its shows 4 or 4.8 MB/s writing speed.
dukuletz said:
3MB/s for a class 2 card is pretty good. I don't what you can expect more from that.
I have an Kingston 16Gb Class 4 and the writing speed from pc -> phone is like 2MB/s, much slower then it should. But in SD Tools its shows 4 or 4.8 MB/s writing speed.
Click to expand...
Click to collapse
The card I got is a class 4, and being a san disk I expected better write speeds.
What is really confusing is why the 2gb card (with no class markings) I got free with an old phone is much faster at transferring files via usb despite it getting a much lower score in SD tools.
Can anyone explain that?
So I bought a Samsung EVO+ SDHC card on Amazon and I am trying to figure out if I got hosed. It is a UHS-1 card and is supposed to get write speeds up to 20MB/S, but I am getting 5-8... I have it mounted as an external card. I've tried 2 different speed test apps on Android. Do these speeds sound like what I should be expecting?
When I put the card in, I originally set it as internal, but the phone gave me a warning the card was slow (another not-so-good sign).
Should I try to return it to Amazon and just buy some place locally?
Link to item?
Sent from my XT1650 using Tapatalk
I bought this SanDisk Extreme 64GB MicroSDXC UHS-1 card about two weeks ago, working great! No speed warning when I set it as internal. Rated up to 90 MB/s, and I just measured 61.82MB/s Read & 55.87MB/s Write. Maybe you got a knockoff?
This is the one I got: https://www.amazon.com/gp/product/B0118LR9Z8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Which app did you use to test the speed? I am wondering if my issue was that I was looking at random write speeds instead of sequential. I found several references around the Interwebs that show similar performance. The faster speeds seem to be sequential writes..? Could that be my issue?
One of the apps I tried did identify it as an actual Samsung card, but perhaps it was a slower class card relabeled?
I used A1 SD bench.
I tried 2 different Evos and can Evo+ and the phone didn't like any of them.
I had to but a Pro+ for it not to contain about the card bring slow.
TheKaz said:
This is the one I got: https://www.amazon.com/gp/product/B0118LR9Z8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Click to expand...
Click to collapse
Note - the Samsung card is a U1, compared the SanDisk Extreme which is U3. Big difference, lol. Make sure to get a UHS-1 U3 or higher card to eliminate speed issues.