Hi All,
Just got myself a 16GB version of one of these:
http://www.transcend-uk.com/Products/ModDetail.asp?ModNo=195&SpNo=1&LangNo=0
to replace the stock 8GB Class 2 card that came with the phone. Unpackaged carefully to avoid dribbling on it
Have run benchmarks using both SKTools and Pocket Mechanic and ..... approx 5% SLOWER than standard card!! Have got SDTuneUp loaded, am I missing something glaringly obvious here???
SKTools summary results:
8GB Class 2 Sandisk (supplied with phone):
Buffered Write speed 910 KB/s
Read speed 7119 KB/s
16GB Class 6 Transcend:
Write speed 859 KB/s
Read speed 7021 KB/s
Could the glaringly obvious thing be *don't buy Transcend cards* ??!!! Am I benchmarking with the wrong software (figures vary greatly between the 2 apps but summary is the same - this card is slower)
Any tweaks I'm missing?
Cheers.
Bones.
Is this with the card in the phone or in a card reader?
Most likely it's the limitation of the phone. Try some desktop benchmarks with a good card reader.
You won't gain much speed from higher speeds cards on a phone.
ez2remember said:
Most likely it's the limitation of the phone. Try some desktop benchmarks with a good card reader.
You won't gain much speed from higher speeds cards on a phone.
Click to expand...
Click to collapse
hmm so whats the point of buying a higher class SD card?
Benchmarked in phone. I'll try in my card reader tomorrow. Got to say I'd be very disappointed if it's a hardware limit in the phone, class 2 cards are much cheaper than class 6 and HTC should have made this apparent if this is the case...
Will update when re-benchmarked, anyone got an comparison stats?
one comparison Class 6 to Class 4
At hand a Transcend 16gb Class 6 and Toshiba 2gb Class 4 SD cards measured in Thinkpad card reader:
Crystal Disk Mark mb/s
Transcend/Toshiba
Seq: 14.78/12.11 read 8.755/5.315 write
512K: 14.76/12.09 read 1.982/2.010 write
4k: 3.114/3.216 read 0.025/0.025 write
Not much there to recommend Class 6
Are you sure you have 8GB class 2 sandisk card? I got class 6 with the ppc.
My results in SKTools:
write: 642 KB/sec
read: 2963 KB/sec
That's 16GB class 2 sandisk card formatted with 32KB clusters. So i think your card is ok
Double post
Class6 does not mean that its faster its just "assure" you it can transfer up to 6mb/s. Thats prolly a device limit and not the card you should try it on a notebook or card reader outside phone. I thought the same when i bought a 16gb sdhc class6 SD for my axim - had no changes in speed at all =\
Related
i have a class 2 sd card that is 4gb. i read that you need class 6 for apps to sd card? will it not work on class 2?
It'll work but it'll just lag your phone down whenever any writing is taking place since the write speed is only 2mb/s compared to a class 6, 6mb/s.
Keep in mind that SDHC "class" system is only a guaranteed minimum. There are some class 4 cards out there that actually out perform some class 6 cards. Do your homework (read:google) and get a card that is > 8MB/s write and > 9MB/s read and you will max out the speed capabilities of your G1.
I can personally verify that the AData class 6 8G and the SanDisk class 6 8G both outperform the G1's capabilities. Also, from what I have read, the SanDisk class 4 16GB also outperforms the G1's capabilities.
Also, I have found that even though the SanDisk and the AData cards mentioned above exceed the G1's capabilities, the AData card is a better card for the G1 (in my particular case.) For some reason my Sandisk card can only get 6.5MB/s write and my AData card can get 8MB/s+ write speed on the G1.
Link to speed tests (please add to it if you have more info)
http://forums.t-mobile.com/tmbl/board/message?board.id=AndroidHardware&thread.id=357
i have a class 4 8GB card and i moved my apps to the sd card about a month ago...it was VERY laggy, so i went back to keeping the apps in the G1's internal memory.
i will try again when i get a class 6.
I have a class 2 16GB Sandisk card, and I have to say - there are no lags whatsoever. The card is much faster than the stock 1GB one, and if moving applications, you don't need that much write speed - the read speed is much more important. I can get 14 MB/sec read speed via cardreader with this card, while the stock 1GB one gives 5 MB/sec only (tested with hdparm).
Just remember - move only applications, NOT their data or caches (which is really unstable anyway). You should have no problems with speed this way - application startup is still fast (if a program is 7 MB, it needs 0.5 sec to be read, which is perfectly acceptable), and you still write to the phone's internal memory.
Hey folks,
is there any Speed difference between a Micro SDHC Card with Class 2,4 or 6 while working with the HD2? For example loading big files like Navigation Software.
Copying things onto the Card is for sure much faster, but while copying i've time to wait. Intressting to me is just the speed difference while working with the phone.
greetz,
stunner
stunner2002 said:
Hey folks,
is there any Speed difference between a Micro SDHC Card with Class 2,4 or 6 while working with the HD2? For example loading big files like Navigation Software.
Copying things onto the Card is for sure much faster, but while copying i've time to wait. Intressting to me is just the speed difference while working with the phone.
greetz,
stunner
Click to expand...
Click to collapse
I've got a class 2 16GB SanDisk card in mine, and if a class 4 or class 6 make operation time any quicker, then I seriously doubt that you'd notice it. I've not tried any other classes, so can't compare, but I can definitely say that a speed improvement is not required.
allright
a 16gig class 2 is ordered!
Depends on the storage size. With most 16GB cards, there's almost no difference between class 2,4,6.
The less the storage size, the greater the difference between the classes.
However, I recommend a quick test to make sure the data rates are acceptable, before you keep the card.
@johncmolyneux
what's your average speed with 16gig class2 (card in the HD2 and connected via USB)?
Would be great if you could make some Benchmarks with HDTune or HD2testw!
A friend of mine got an PNY Premium 16gig Class2 Card and he got:
~3MB/s Write
~8MB/s Read
(hd2testw)
i hope its the card that is limiting and not the HD2, because these values are bullsh*t!
stunner2002 said:
@johncmolyneux
what's your average speed with 16gig class2 (card in the HD2 and connected via USB)?
Would be great if you could make some Benchmarks with HDTune or HD2testw!
A friend of mine got an PNY Premium 16gig Class2 Card and he got:
~3MB/s Write
~8MB/s Read
(hd2testw)
i hope its the card that is limiting and not the HD2, because these values are bullsh*t!
Click to expand...
Click to collapse
Reading, I got 8.3MB/s, but couldn't try a write test as it wanted to remove the partition on the card. I then tried the same test with the 8GB Transcend card (class 6) that was in my HD, and I got around 50MB/s read on that.
It was definitely a noticable difference doing that test, but not a noticable difference when using the device.
Incidentally, I couldn't find a single thing about hd2testw. Do you have any links?
what? 50MB/s Read. thats stunning!
is the 16gig Card a SanDisk or also one of the "cheaper" producers?
Try ATTO Benchmark.
I'm now going to cancel the ordered card and get the SanDisk 16gig from amazon. Reviewers on amazon talking about 10MB/s write and up to 20MB/s read. Hopefully the HD2 can make same results!
These are both using ATTO Benchmark (8MB chunks, 256MB size).
16GB card is a SanDisk, class 2.
Write : 4 MB/s
Read : 8.6 MB/s
8GB is a Transcend, class 6.
Write : 6 MB/s
Read : 7.4 MB/s
I trust neither of the apps that I've used for these tests, as the results don't make any sense.
johncmolyneux said:
I then tried the same test with the 8GB Transcend card (class 6) that was in my HD, and I got around 50MB/s read on that.
Click to expand...
Click to collapse
No offence, but I would be inclined to suspect your benchmarking software if it's claiming 50MB/s. That sort of speed suggests that all the reading and writing is actually being done to or from an in-RAM cache rather than the card itself.
Shasarak said:
No offence, but I would be inclined to suspect your benchmarking software if it's claiming 50MB/s.
Click to expand...
Click to collapse
I totally agree with you, and did so before you said that
johncmolyneux said:
I trust neither of the apps that I've used for these tests, as the results don't make any sense.
Click to expand...
Click to collapse
johncmolyneux said:
These are both using ATTO Benchmark (8MB chunks, 256MB size).
16GB card is a SanDisk, class 2.
Write : 4 MB/s
Read : 8.6 MB/s
Click to expand...
Click to collapse
32KB cluster size ?
What is the best cluster size to use for formatting a 16 gig card?
I'm sorry to report that I've returned the Kingston Class 4 32Gb microSD card for its failure to perform.
Performance writing to this Kingston card (from a desktop PC, card in either the N1, or the PC's card reader) was ~820KB/Sec
Writing the same data files to a Sandisk Class 2 16Gb card I achieved > 1.5MB/sec - i.e. approx twice as fast.
(PC is Acer Quad core 2.6Ghz jobbie with 8Gb RAM running Windows 7)
I found it really hard to get 4MB/sec out of the Kingston card - and only achieved it with 1 of the test options on CrystalMark. (write 1Gb sequential files)
When I tried this test with the 16Gb Sandisk class 2 card I got 10MB/sec. Clearly the SanDisk isn't a class 10 card - so I'm guessing the Crystal benchmark test isn't completely appropriate for SD card writers!.
I supplied Kingston with the packaging details / photos etc and they confirmed that it IS a real Kingston class 4 card. They agreed that performance should be better. LamndaTek clearly agreed too - after they received my return and tested it they gave me a full refund. (32Gb £83.66 (Inc VAT)). (Many thanks guys)
I guess the card was faulty.. but I might just be placing my trust in Sandisk now, as I've never had any problems with their cards.
I just thought that you all should know..
Graham
did you test it with a card adaptor or from the nexus one?
Also, if you're writing hundreds of small files vs one large file it makes a difference.
I think it was just a defective card.
Even the POS 32Gb cards floating around out there write at faster than 800kb/sec mb/sec.
SanDisk suck!
I will never buy any sandisk flash,sd card, micro again.. they have the worst CS i have ever delt with.. THey stand on their High Horse thinking their **** dont stink just because they said they only have a 1% defective rate.. which is crap if you ask me.. i went through some many defective flash drives used as keeping files on them and music to play in my scion xb.. So pretty much they told me i was mis using the device.. so i told them i would never buy from them..
so Kingston all the way now. they have the best CS i have ever delt with.. good day!
mynameisjon said:
did you test it with a card adaptor or from the nexus one?
Click to expand...
Click to collapse
I tested it with both options - the supplied adaptor - and also in the Nexus 1 - couldn't get it faster that I quoted, in any combination. Even tried a reformat - still no good.
Also, if you're writing hundreds of small files vs one large file it makes a difference.
Click to expand...
Click to collapse
It was a mixture of file sizes for the main copy, i.e. the contents of the 16Gb drive over to the 32Gb drive. About 14Gb were music files which come in at about 4Mb each.
As the other guys said above Kingston customer services were very responsive once they identified the card as genuine.. but LambdaTek were even more so.
I've still never had a Sandisk product give me an error though (I have 3 cards from them)
G.
I've used SanDisk for years without issue. Also been extremely happy with Lexar. Kingston, on the other hand, has been a complete letdown to me! A couple years ago, I bought a 4gb class 6 Kingston card for my digital camera. I didn't run any controlled benchmarks, but real-world use showed only about 2-3mb/sec transfer rates, which I thought was kind of slow. Also, as I was using a card reader instead of just plugging my camera in every time I needed to move pictures, the card was constantly being moved between devices. This proved fatal to the card, as the cheap plastic began to come apart. Never ever have I seen that happen to *any* SD card, even the cheap no-name ones! It started with the little tabs between each of the contacts, but didn't take long before the top and bottom of the card had begun to split. After a few months, the Kingston card was no good - all because of a disappointing casing. I wasn't rough with the card - I didn't treat this card any differently than others. In fact, I still have a 64mb SanDisk card from several years ago that's still going strong (great for sharing some jpgs, docs, etc.) So it might be worthwhile staying away from Kingston altogether...
Brands I've been happy with:
SanDisk
Lexar
Duracell
Transcend
Brands I've been disappointed with:
Kingston
so what is the deal with the N1 and its SD card speed?
i have a Transcend 8gb Class 6 card, i bought it for my G1 and recently got a N1.
on my G1 i would get an as expected 6 mb/sec or better copying files to/from it. in the N1 its never much more than 2mb/sec at most. this is apparently just when copying files via usb though
i just ran the app j bench mark 1.0.
when set to 10mb (2kb buffer) the default and lowest test setting i get
1.5mb sec write 2.5mb sec read
when set to 100mb (8km buffer) i get
6.16 mb/sec write
10.34 mb/sec read
so clearly internally the phone can and does handle the card at full speed but connected to PC's it does not.
and before anyone says it yeah i know just use a card reader to transfer large files.. whatever shouldn't need to do that imho
(megabytes not bits i am quoting here, i know the difference)
I have sandisk 16gb class 2 and under android 2.2 I gоt 1.5 mb/s and under android 2.1 I gоt 7-8 mb/s
gf_gollum said:
I'm sorry to report that I've returned the Kingston Class 4 32Gb microSD card for its failure to perform.
Performance writing to this Kingston card (from a desktop PC, card in either the N1, or the PC's card reader) was ~820KB/Sec
Writing the same data files to a Sandisk Class 2 16Gb card I achieved > 1.5MB/sec - i.e. approx twice as fast.
(PC is Acer Quad core 2.6Ghz jobbie with 8Gb RAM running Windows 7)
I found it really hard to get 4MB/sec out of the Kingston card - and only achieved it with 1 of the test options on CrystalMark. (write 1Gb sequential files)
When I tried this test with the 16Gb Sandisk class 2 card I got 10MB/sec. Clearly the SanDisk isn't a class 10 card - so I'm guessing the Crystal benchmark test isn't completely appropriate for SD card writers!.
I supplied Kingston with the packaging details / photos etc and they confirmed that it IS a real Kingston class 4 card. They agreed that performance should be better. LamndaTek clearly agreed too - after they received my return and tested it they gave me a full refund. (32Gb £83.66 (Inc VAT)). (Many thanks guys)
I guess the card was faulty.. but I might just be placing my trust in Sandisk now, as I've never had any problems with their cards.
I just thought that you all should know..
Graham
Click to expand...
Click to collapse
Had the same problem... RMA'd it with newegg and the replacement comes in tomorrow... I hold out hope.
Sandisk more me, no problem so far
My replacement Kingston class 4 holds out class 2 speeds on write of large files, less than that on write of small files. Blazingly slow on write, but faster on read than my class 6 8gb sandisk...
All in all... I can live with it for now...
The article below is an interesting read regarding Kingston and the sdcard market in general.
http://www.bunniestudios.com/blog/?p=918
Hi Guys,
I have a strange situation going on here with my micro SDHC cards. I have an 8gb Sandisk card class 2 and I just bought a 16gb Duracell class 4 card as I wanted a bit more space than 8gb for my desire HD (to be arriving soon).
Anyway the 16gb card arrived today in the post so I was bored and decided to do some speed tests on the 2 cards just to check. The class 4 card wrote at 4.1 mb/s which I presume is what it should do...right? How ever the class 2 card wrote at 13.5 mb/s!! I tested it several times with large amounts of data (using the H2testw program) and it kept getting the same results.
So it lead me to think that there is something wrong with my class 4 card (or its a fake). It does write at 4 mb/s but that is the bare minimum and surely it should be doing better? I got it off ebay and am now aware of the extreme amount of fake cards on there.
Anyone with a little experience on the matter care to offer me some insight?
Btw I will be using my phone for pictures and 720p recording so I want a fast card...but after this I am just confused.
Thanks
ccart said:
Hi Guys,
I have a strange situation going on here with my micro SDHC cards. I have an 8gb Sandisk card class 2 and I just bought a 16gb Duracell class 4 card as I wanted a bit more space than 8gb for my desire HD (to be arriving soon).
Anyway the 16gb card arrived today in the post so I was bored and decided to do some speed tests on the 2 cards just to check. The class 4 card wrote at 4.1 mb/s which I presume is what it should do...right? How ever the class 2 card wrote at 13.5 mb/s!! I tested it several times with large amounts of data (using the H2testw program) and it kept getting the same results.
So it lead me to think that there is something wrong with my class 4 card (or its a fake). It does write at 4 mb/s but that is the bare minimum and surely it should be doing better? I got it off ebay and am now aware of the extreme amount of fake cards on there.
Anyone with a little experience on the matter care to offer me some insight?
Btw I will be using my phone for pictures and 720p recording so I want a fast card...but after this I am just confused.
Thanks
Click to expand...
Click to collapse
Your card is just fine. The class of a memory card just tells you how slow it isn't, not how fast it can get.
Class 2 - Minimum of 2 MB/s performance.
Class 4 - Minimum of 4 MB/s performance.
Being a class 4, a minimum 4 MB/s is fine and passes the class 4 classification. But a 13.5 MB/s for a class 2 is great!
in my experience larger cards tend to be slower in real life situations anyway, i have found issues using slower cards so tend to stick with a minimum of class 6 (but then your class 2 exceeds that spec )
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