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Hey Ppl...
What Type Of MicroSDHC Class, Should I Buy For Arc?
Class 4, 6 or 10?
Right now i´ve Class 2
Its better to get the highest which is class 10 if u can afford..
The Classes guarantess a lowest speed while newely formated
class 2 is 2MB/s
class 6 is 6MB/s
class 10 is 10MB/s
and so on
but with luck a class 2 card can outpreform a class 6 card but you never know untill you have bought it.
the use of a higher class is more important how often you transfer big amout of files/data from and to your phone (this is when you will notice a slow card)
everyday use the class 2 card that is shipped with the phone works perfect
I'm going for a 16GB Kingston Class 10 for mine, might go 32GB but that'll depend on how much I get for my X10 on ebay.
XperienceD said:
I'm going for a 16GB Kingston Class 10 for mine, might go 32GB but that'll depend on how much I get for my X10 on ebay.
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Click to collapse
Put my X10 on ebay yesterday!
How much you asking for it?
For no OT, I bought a 32 GB Lexar class 10 MicroSDHC
LususNaturae said:
Put my X10 on ebay yesterday!
How much you asking for it?
Click to expand...
Click to collapse
Not sure yet, it's a bit weared so not expecting a great deal.
Here's the thing: the class of an SD card only defines how fast you can *write* to it. The read speeds of all cards tend to be the same regardless of class.
What a faster class of SD card will get you:
* faster copying of files from PC to SD, e.g. music, video
What it won't get you:
* a faster running phone (i.e. no 'snappier' performance)
* apps loading faster
* faster copying of files from SD to PC
* music/video playback improvements
* faster installation of apps - these are stored in internal memory, and even for builtin apps2sd the limiting factor tends to be the download speed
What it might get you:
* faster stills camera operation (havent checked for the arc, there may be bottlenecks elsewhere in the system, e.g. cpu)
* i thought it might solve the video capture glitching, but apparently the new firmware has fixed this regardless of SD card class.
* some apps which write a lot of data to SD card may run faster (note however that for most apps data is stored in internal storage)
Nothing inherently wrong with getting a faster card, just dont delude youself you'll see much of a difference in day-to-day operation.
Oh, i forgot, EXCEPT one other thing: If youre using 'full' apps2sd on a rooted phone (i.e. with an ext2 partition moving all apps+data+dalvik cache onto it) it will definitely help to have a faster class of SD card. Dunno if anyone really still does that these days...
I've always found going bigger and faster to be best, but valid points made.
daveybaby said:
Here's the thing: the class of an SD card only defines how fast you can *write* to it.
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That's incorrect - the class rating is a guarantee of both read and write speeds.
daveybaby said:
The read speeds of all cards tend to be the same regardless of class.
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Click to collapse
You can't guarantee that any more than you can guarantee that a Class 2 card will write at speeds higher than 2MB/s.
The only way to be sure of getting a card that will read at a certain speed is to buy the appropriate class.
Step666 said:
That's incorrect - the class rating is a guarantee of both read and write speeds.
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Click to collapse
That's a nice opinion, but unfortunately it's just wrong.
Have a look at this. Notice they dont mention read speeds anywhere, that's because theyre already so fast regardless of class that it's irrelevant.
When you buy a class 10 SD card, youre spending your money on faster writes.
The read speeds of all cards tend to be the same regardless of class.
Click to expand...
Click to collapse
The limiting factor in read speeds is the interface, not the memory technology. I believe SDXC may have faster interface specs than SDHC (which in turn has faster specs than plain SD), but this is nothing to do with class, and make no difference if youre plugging them all into an SDHC device anyway.
Try reading that page again, it doesn't say that the class certification is a measure of writing speed, it says it's the bus-interface speed - it merely mentions write speeds as examples of why you would need higher speeds in real life.
The read speeds that the cards are actually capable of may well be higher but in practice the write speeds are almost always higher too - but there's no guarantee they are.
Step666 said:
Try reading that page again, it doesn't say that the class certification is a measure of writing speed, it says it's the bus-interface speed - it merely mentions write speeds as examples of why you would need higher speeds in real life.
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Click to collapse
So it's just a coincidence that nowhere does anyone mention read speeds, only write speeds and recording, when talking about flash memory. Because nobody's interested in read speeds, right?
Look, the read speeds of flash memory devices are stupidly high compared to write speeds (and always have been), and are limited by the interface, the write speeds are limited by the technology of the memory itself (which is the bit all of the manufacturers have spent millions (probably billions actually) improving over the last 10 years.
I hate quoting wikipedia articles but:
The Speed Class Rating is the official unit of speed measurement for SD Cards, defined by the SD Association. The Class number represents a multiple of 8 Mbits/s (1 MB/s), and meets the least sustained write speeds for a card in a fragmented state.[17]
These are the ratings of all currently available cards:[14][24]
Class 2, 2 MB/s
Class 4, 4 MB/s
Class 6, 6 MB/s
Class 10, 10 MB/s
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I can see this going round in circles. From what I've read, basically, if you put a class 10 card in a phone that has been running a class 2 card then you're not going to see the difference like you would putting 4GB of memory in a PC that has been running on 512MB, but having a higher class of card will improve some areas behind the scenes so to speak.
If I didn't have an X10 to sell then chances are I'd stick with my class 6 Samsung but as I'll have the money to go class 10 I am doing.
daveybaby said:
Look, the read speeds of flash memory devices are stupidly high compared to write speeds...
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Click to collapse
And?
Real-world write speeds on cards are generally higher than their class rating would suggest but you are only guaranteed the speed corresponding to the class the card is.
Exactly the same applies to read speeds, they will most likely be much higher in real life but you are only guaranteed the speed that corresponds to the rated class of the card.
The class of a card guarantees minimum read and write speeds but both will likely be noticeably higher in real life.
Class has nothing to do with read speed period. Manufacturers only guarantees the write speed based on classifications because read speed will only be the same for all class of cards. Try the "Sd Tools" app if you don't believe me.
Therefore, unless you are using the defunct "app2sd+ data, dalvik", there should not be any discerning difference except for its higher price.
Sent from my LT15i using XDA App
Step666 said:
And?
Click to expand...
Click to collapse
And the read speed limit is defined by the interface implementation not by the class of the card. When i say flash read speeds (i.e. reading data from the cell) are fast, i mean theyre to all intents and purposes instantaneous, they always have been - they havent gotten any faster in the last 20 years - it's inherent in the technology. The thing that takes all the time is shuffling the bits of data across the serial interface.
It's entirely possible for a class 2 card by one maufacturer to have faster read speeds than a class 10 card by another manufacturer. It's entirely possible for the same card to have different read speeds in different devices due to the interaction of the interface implementations (subtle timing differences). Write speeds arent affected by this as much because the bottleneck is the large amount of time it takes to erase a cell and rewrite it.
Note that if you have a really old class 2 card, it's probably going to have much slower read speeds than a brand new class 10 card. This is not inherently due to the class of the card, it has everything to do with the fact that manufacturers only implemented faster interfaces to handle class 10 cards once the technology to *write* at this speed became available. Due to economies of scale they implement these faster interfaces across the board. New class 2 cards will be able to read as fast as new class 10 cards.
That's all i'm going to say on this matter, if you dont believe me you dont believe me, i'll agree to disagree.
daveybaby said:
That's all i'm going to say on this matter, if you dont believe me you dont believe me, i'll agree to disagree.
Click to expand...
Click to collapse
I'm afraid I don't, we'll have to disagree.
The sdhc that came in the box has a class 2 rating in it but using sd tools, it writes at 6mb/sec average, bursting at 9mb/sec. Read speed is the same as my older 8Gb class 6 at 19-20mb/sec.
Step666 said:
I'm afraid I don't, we'll have to disagree.
Click to expand...
Click to collapse
Cool
I have Sandisk Micro HDSD 16GB Class 2 but in SD Tools Write Speed: 10.1Mb/s, Read Speed: 27.5Mb/s
Can anyone comment yet on the speeds they are getting with their internal microsd cards for read and write?
I would like to see if it is worth splashing out on an expensive high speed card, or because it is running USB2 that in real terms it is crippled to about 20MBps read/write. It would be a pitty if the speeds are crappy, as samsung is making some pretty sweet microsd cards these days.
Regards
hardjards said:
Can anyone comment yet on the speeds they are getting with their internal microsd cards for read and write?
I would like to see if it is worth splashing out on an expensive high speed card, or because it is running USB2 that in real terms it is crippled to about 20MBps read/write. It would be a pitty if the speeds are crappy, as samsung is making some pretty sweet microsd cards these days.
Click to expand...
Click to collapse
Afaik, sd card doesn't use the usb bus.
I have a cheap 64GB microsd and it gives 40/18mbps on the 8.4 pro on a1 sd bench tests
ssuper2k said:
Afaik, sd card doesn't use the usb bus.
I have a cheap 64GB microsd and it gives 40/18mbps on the 8.4 pro on a1 sd bench tests
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Thank you very much Ssuper2k. That is good to know if you are getting decent speeds on a cheap 64GB microsd. Anyone got any high rated SD cards share any light on what it tops out at ?
Thanks again.
hardjards said:
Thank you very much Ssuper2k. That is good to know if you are getting decent speeds on a cheap 64GB microsd. Anyone got any high rated SD cards share any light on what it tops out at ?
Thanks again.
Click to expand...
Click to collapse
Heres mine... Sandisk 64GB Class 10
BossJ said:
Heres mine... Sandisk 64GB Class 10
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Click to collapse
That is not the SD card...
My g.skill 64GB class 10 benchmarks around 44MB/sec read, 14 write. It cost $25.
Skitals said:
That is not the SD card...
My g.skill 64GB class 10 benchmarks around 44MB/sec read, 14 write. It cost $25.
Click to expand...
Click to collapse
ooops. you are right... a1 sd bench labels it wrong. It says Internal SD card as my external and my internal as my external. (Sorry)
Here's my new results - reading 40 MB/sec 14 MB/s write..
Once again - sorry about that.
Guys, when you say Class 10 you aren't really speaking to the speed of the card. There is a wide range of speeds in cards that are all rated as class 10. Samsung has some that are 90 read and 80 write for example and most only advertise as 30 read and don't even say their write. Anyone have one of Samsung's good 90/50 or 90/80 cards they have tested?
I have just benchmarked a 64GB Samsung Pro MicroSDXC card (rated at 90MB/s read, 80MB/s write). In a USB 3.0 card reader on my computer it writes at around 65MB/s average and reads at upwards of 80MB/s.
In the Tab S 8.4 (Wi-Fi only model) it benchmarks at 49.53MB/s read and 24.53MB/s write in A1 SD Bench
So what would anyone say... Is the best card for this particular device? Any recommendations?
If you're not planning on taking the MicroSD card out of the tablet in order to transfer content onto it, then you might as well just go for a mid-range card as it will be limited by USB 2.0 transfer speeds anyway. I'd say the Samsung Evo or the old Samsung Pro card would be fine depending on pricing.
I dont plan on taking it out. Since the above Benchmade had the pro at 49.53MB/s read. I feel It's just going to be overkill. Since its not getting the full 90 MB/s read 80MB/s write. I'm thinking the Evo should suffice. What are your thoughts?
I meant the old Pro model, which I think was 70MB/s Read - 20MB/s write, these can sometimes be had for similar money as the new Evo. I think you'd be fine with either of those, or even the Plus model. I think the Samsung MicroSDs are fairly reliable in general.
So nobody knows if Tab S has standard bus, high speed bus or Ultra High Speed Bus UHS-I or UHS-II?
I think that micro SD card Class 10 U3 guarantees minimum 30MB/s. So it supports even 4K recording...
But I still don't know if it is worth of a lot of money. If benchmarks are true - Tab S has UHS (your 45MB/s). If!
bus speeds
belek1979 said:
So nobody knows if Tab S has standard bus, high speed bus or Ultra High Speed Bus UHS-I or UHS-II?
I think that micro SD card Class 10 U3 guarantees minimum 30MB/s. So it supports even 4K recording...
But I still don't know if it is worth of a lot of money. If benchmarks are true - Tab S has UHS (your 45MB/s). If!
Click to expand...
Click to collapse
According to Samsung support, the Tab S micro SD speeds is limited by the USB 2.0 bus, or 60 MB/s. So that would imply UHS, though the 90MB/s cards would not get the full speed. I would like to see someone test a 90MB/s card and see what the results are. Probably just going to go with a 48MB/s card if there isn't any difference. Though I think write speeds are significantly different between the higher speed UHS-I cards and the lower speed ones (50 vs 10 MB/s write I think).
If anyone has a couple cards and a Tab S they can test with, I would love to see the results.
Hi
I bought a SanDisk Extreme UHS-3 SD Card out of impulse today.
I'm unsure if the G3 has enough bandwidth to deal with it.
Has anyone bought a UHS-3 SD Card and is using on his G3?
Tapatalked thru my LG G3
Bump
Nobody tried? Couldn't find any info either
Tapatalked thru my LG G3
I am using a 64gb Sandisk extreme UHS-I U3 (UHS Level 3) card. Seems to work fine. I don't understand what issue you were logically expecting to experience.
gandalf_grey91 said:
I am using a 64gb Sandisk extreme UHS-I U3 (UHS Level 3) card. Seems to work fine. I don't understand what issue you were logically expecting to experience.
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Click to collapse
Improved speeds etc. I thought about using MultiROM on it.. Could you please run A1 SD bench and post the results?
I'm getting pretty much the same card as you
GTMoraes said:
Improved speeds etc. I thought about using MultiROM on it.. Could you please run A1 SD bench and post the results?
I'm getting pretty much the same card as you
Click to expand...
Click to collapse
Read 67.05MB/s Write 31.64MB/s
gandalf_grey91 said:
Read 67.05MB/s Write 31.64MB/s
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Click to collapse
Write speed looks very good, but read is disappointing...
thanks! But it seems that the G3 is limited to UHS-I =/
I am getting 38.44 and 20.03 only for samsung evo uhs 1 I guess your result is pretty good
Zenroid said:
I am getting 38.44 and 20.03 only for samsung evo uhs 1 I guess your result is pretty good
Click to expand...
Click to collapse
I'm using a Samsung Class 10 SD Card. Terrible 44.34MB/s read and 17.38MB/s write, default benchmark
Using the Precise Benchmark, I'm getting 59.7MB/s read and 19.22MB/s write. It's too bad.
In comparison, I'm getting 183.92MB/s read and 38.7MB/s write on the internal memory (precise benchmark, with reboot)
I expected somewhere near the internal memory read speeds with the Sandisk extreme, but at least there's the decent write speed.
I wanted to run some ROMs on the memory card, but with those read speeds, it doesn't seem feasible.
Or perhaps the G3 internal memory is just absurdly fast. I'll try with some other devices around my home
---
Funny. The Galaxy S4 Mini here has slower internal memory than my Class 10 SD Card. But still, if I install Android on my SD Card, it'll be as slow as taking 10~20 seconds to open a simple app.
I don't get it
gandalf_grey91 said:
Read 67.05MB/s Write 31.64MB/s
Click to expand...
Click to collapse
Just received my UHS-3 card.
Pretty disappointed by the read speeds.
I was getting ~65MB/s read and ~14MB/s write.
The SanDisk Extreme is giving me ~48MB/s read and ~30MB/s write.
Massive improvement in write, but messed up in read.... I don't know what's wrong
GTMoraes said:
Just received my UHS-3 card.
Pretty disappointed by the read speeds.
I was getting ~65MB/s read and ~14MB/s write.
The SanDisk Extreme is giving me ~48MB/s read and ~30MB/s write.
Massive improvement in write, but messed up in read.... I don't know what's wrong
Click to expand...
Click to collapse
Being the inventor of trans flash memory, Sandisk seems to feel the need to provide a distinct USP, over and above the competition, for it trans flash memory products. Unfortunately this usually means they are surfing very close to edge of their fabrication technology. I base this on my observation of the ever-changing product code attached to Sandisk 128GB micro sd cards, which has changed 3 times in the last 10-12 weeks.
Put simply, like CPUs, I believe Sandisk are speed testing and grading their trans flash products, the extreme range is exactly the same as the ultra range, only labeled and marketed differently. Because there is no distinct technological advantage, there is likely to be a more pronounced range in both read and write speeds. So, while a tested write speed of, for example, 30MB/s may mean an individual micro sd card can be labeled as "extreme" by Sandisk, doesn't mean its read speed will be consistent with every other micro sd card labeled as "extreme".
Oh, and remember, only 4KB random write speed is the true write speed test for memory cards. This is the specification that makes the real difference if you need to boot an OS from the card.
gandalf_grey91 said:
Being the inventor of trans flash memory, Sandisk seems to feel the need to provide a distinct USP, over and above the competition, for it trans flash memory products. Unfortunately this usually means they are surfing very close to edge of their fabrication technology. I base this on my observation of the ever-changing product code attached to Sandisk 128GB micro sd cards, which has changed 3 times in the last 10-12 weeks.
Put simply, like CPUs, I believe Sandisk are speed testing and grading their trans flash products, the extreme range is exactly the same as the ultra range, only labeled and marketed differently. Because there is no distinct technological advantage, there is likely to be a more pronounced range in both read and write speeds. So, while a tested write speed of, for example, 30MB/s may mean an individual micro sd card can be labeled as "extreme" by Sandisk, doesn't mean its read speed will be consistent with every other micro sd card labeled as "extreme".
Oh, and remember, only 4KB random write speed is the true write speed test for memory cards. This is the specification that makes the real difference if you need to boot an OS from the card.
Click to expand...
Click to collapse
That was very informative. Yes, it seems that Sandisk is pushing any 30MB/s write card as Extreme, and if it complies with a minimum read (very minimum it seems), it's off to go.
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Many thanks for this answer! I'll check for random 4kb write to see which one fares better
Tapatalked thru my CM12 G3!
GTMoraes said:
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Click to expand...
Click to collapse
Two quotes from the Sandisk legal statement about Extreme 64GB micro sd card:
2) Card only. Up to 80 MB/s read; up to 50 MB/s write. Based on internal testing; performance may be lower depending upon host device.
(4) UHS Speed Class 3 designates a performance option designed to support real time video recording in U3-enabled host devices.
---------- Post added at 11:41 PM ---------- Previous post was at 11:26 PM ----------
GTMoraes said:
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Click to expand...
Click to collapse
Sorry, previous numbers were for 64GB Extreme Plus micro sd cards (Costs twice as much). For 64GB Extreme micro sd card it should have read:
(2) Up to 60 MB/s read speed; up to 40 MB/s write speed. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.
See what I said about grading the speed of the cards. Just so they can squeeze a little more money from their customers. BTW I see that Kingston and Lexar are doing 128GB micro sd cards now.
gandalf_grey91 said:
Two quotes from the Sandisk legal statement about Extreme 64GB micro sd card:
2) Card only. Up to 80 MB/s read; up to 50 MB/s write. Based on internal testing; performance may be lower depending upon host device.
(4) UHS Speed Class 3 designates a performance option designed to support real time video recording in U3-enabled host devices.
---------- Post added at 11:41 PM ---------- Previous post was at 11:26 PM ----------
Sorry, previous numbers were for 64GB Extreme Plus micro sd cards (Costs twice as much). For 64GB Extreme micro sd card it should have read:
(2) Up to 60 MB/s read speed; up to 40 MB/s write speed. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.
See what I said about grading the speed of the cards. Just so they can squeeze a little more money from their customers. BTW I see that Kingston and Lexar are doing 128GB micro sd cards now.
Click to expand...
Click to collapse
I emailed my seller and he posted pretty much the same thing, and said my card was well within the normal operating speeds, and a replacement wouldn't make it any better.
I'm getting 51MB/s read and 33MB/s write nowadays. Guess something was running on the background back then.
Guess I'll have to live with it. It ain't too bad, and random 4k is better than the Samsung one
Tapatalked thru my CM12 G3!
The Extreme cards will get 40-50 but the Extreme Plus get around 80. The newer Pro gets 95. Its obvious Sandisk is inching forward trying to create a new product with a +$100 price point. I got lucky during the holidays and scored my 64gb Extreme Plus during the holidays for $30
xlxcrossing said:
The Extreme cards will get 40-50 but the Extreme Plus get around 80. The newer Pro gets 95. Its obvious Sandisk is inching forward trying to create a new product with a +$100 price point. I got lucky during the holidays and scored my 64gb Extreme Plus during the holidays for $30
Click to expand...
Click to collapse
Now that was a deal. I got my Extreme 64GB for what would be 90 US Dollars. That's the price around here unfortunately.
I've contacted again my seller and he seems to be okay with swapping my card. I ran the SD test three times for each of my 64GB cards to see how they would fare.
As expected, the Samsung has a higher read speed, but minimum write (Class 10, Minimum 10MB/s write speed, as I've read).
The SanDisk Extreme has a slightly lower write speed than what I thought would be 30MB/s, but nothing too bad. But read speeds are not that good, compared to a lower-end rival card.
http://imgur.com/a/KNGpT
I know, this is probably a silly question, but am I the only one that notices how devices only tend to label compatibility with Micro SD cards based on size, and not speed or class? For instance, my Galaxy Tab S2, it simply says it can take up to a 128gb SD card, but it does not say what speed it will work with.
The reason I ask, is that I am now in the market for a 128gb card, and yet I don't want to buy an expensive fast one, if my tablet will not be able to take advantage of the premium speed. Anyone have any thoughts?
I don't know about the speed but I have a SanDisk 200 GB that runs fine.
I think that any phone or tablet that will read 128 GB will also work with 200 GB.
Shofar
Don't worry
Any MicroSD card will work in your Galaxy Tab S2. But then, you might have to format it. When you buy the card, keep an eye out on the speed class- higher speeds are much better!
You are looking for a 128GB card, and I use one in my tablet so don't worry. It will work! But I seriously recommend a higher performance card because it can get very slow with cheaper cards.
Hope this helps!
I just tested a regular class 10 card and a UHS-1 card. Both tested at 9mb write and 40mb read. The same UHS-1 card tested over 40mb write using an Odroid C1 board.
lewmur said:
I just tested a regular class 10 card and a UHS-1 card. Both tested at 9mb write and 40mb read. The same UHS-1 card tested over 40mb write using an Odroid C1 board.
Click to expand...
Click to collapse
I suppose that means that using anything above class 10 is irrelevant?
wirelesskebab said:
I suppose that means that using anything above class 10 is irrelevant?
Click to expand...
Click to collapse
No, that means that "class" classification is outdated. Fast cards (read and write) bear the UHS-I "U3" classification, "U1" is slower.
In future, only buy U3 cards, like the SanDisk Extreme family.
saintsimon said:
No, that means that "class" classification is outdated. Fast cards (read and write) bear the UHS-I "U3" classification, "U1" is slower.
In future, only buy U3 cards, like the SanDisk Extreme family.
Click to expand...
Click to collapse
I guess you missed the part where I stated that the UHS card had a write speed of 40mb using the Odroid C1 board. Obviously, when it only writes 9mb in the S2, then the S2 itself doesn't support the higher speeds. So, no matter ability the card has, if the device's bus doesn't support the higher speed, then the card's ability is meaningless. Any card you use is going to be limited by the bus speed of the device.
Paying extra for a better card is pointless if the device doesn't support the higher speed.
lewmur said:
I guess you missed the part where I stated that the UHS card had a write speed of 40mb using the Odroid C1 board. Obviously, when it only writes 9mb in the S2, then the S2 itself doesn't support the higher speeds. So, no matter ability the card has, if the device's bus doesn't support the higher speed, then the card's ability is meaningless. Any card you use is going to be limited by the bus speed of the device.
Paying extra for a better card is pointless if the device doesn't support the higher speed.
Click to expand...
Click to collapse
This was what I meant, I'll make sure to buy a decent one but not the "best". Quick question, how are the internal memory write speeds? Actually, what card should I get then? How fast is the internal memory write speeds? Thanks!
Just tested the 32 GB SanDisk Extreme (U3 but not an Extreme Plus or Pro) in my T815 with the "A1 SD Bench" app:
read 59,70 MB/s or 61,04 MB/s, write 22,75 MB/s or 24,70 MB/s. The second numbers are the result of using the "accurate mode" of the test app.
saintsimon said:
Just tested the 32 GB SanDisk Extreme (U3 but not an Extreme Plus or Pro) in my T815 with the "A1 SD Bench" app:
read 59,70 MB/s or 61,04 MB/s, write 22,75 MB/s or 24,70 MB/s. The second numbers are the result of using the "accurate mode" of the test app.
Click to expand...
Click to collapse
Wat?! Is it possible that the LTE version (T815) vs T810 has a different card reader? If not happy days!
wirelesskebab said:
This was what I meant, I'll make sure to buy a decent one but not the "best". Quick question, how are the internal memory write speeds? Actually, what card should I get then? How fast is the internal memory write speeds? Thanks!
Click to expand...
Click to collapse
Why don't you install the A1 SD Benchmark from the Play Store and test your own cards? My internal storage rates 50mb write and 160 read.
Hi,
I'm considering this microSD for my new tablet s2, do you think is good quality?
http://www.amazon.it/Memoria-SanDisk-Android-MicroSDXC-Adattatore/dp/B010Q57S62/
nephtys59 said:
Hi,
I'm considering this microSD for my new tablet s2, do you think is good quality?
http://www.amazon.it/Memoria-SanDisk-Android-MicroSDXC-Adattatore/dp/B010Q57S62/
Click to expand...
Click to collapse
I am using this SanDisk 128 GB Micro SDXC UHS-1 / Class 10 card and it works fine! The price/performance is good.
In germany (Amazon.de) you can get the card for 33 € (+shipping costs).
nephtys59 said:
Hi,
I'm considering this microSD for my new tablet s2, do you think is good quality?
http://www.amazon.it/Memoria-SanDisk-Android-MicroSDXC-Adattatore/dp/B010Q57S62/
Click to expand...
Click to collapse
For our fast S2, this one is too slow in writing. Class 10 means only fast reading.
You better choose a Samsung or SanDisk with the "U3" designation, which means fast writing, like this:
http://www.amazon.it/Scheda-Memoria...sr=1-5&keywords=sandisk+extreme+pro+microsdxc
FOR EVERYBODY :
I have bought a LEXAR 633x 200GB !!!
And it works !
Speed : read 95Mo/s write : 40Mo/s
For 90$, it do the job very well !
The only better sdcard is the 256GB SAMSUNG but it's out of price !
So a higher performance card or 200GB eill make the tab s2 go faster then? What amount of storage and sd card do you recommend?
It won't make the tab S2 go faster. But it will allow faster read/writing to higher performance sd card compared to a regular one. The S2 can only go as fast as it's hardware can, with or without a microsd card.
Figured I'd share my results with my 2015 S2 8.0 (SM-T710). Right now I have a Samsung EVO Pro (U1) 64GB in my tablet and it does ok, but I'm just about to upgrade it to a new 128GB EVO PLUS (U3) card so got some results below. Note the previous 32GB card I had was waay worse, much older and only did 4MB/sec on writes (forgot the brand) but things have at least come a long way in the years since.
Results as follows...
Samsung EVO Pro 64GB (U1) - 70.53MB/sec Read - 72.86MB/sec Write (Fresh Format)
Samsung EVO Plus 128GB (U3) - 69.91MB/sec Read - 43.40MB/sec Write (Fresh Format)
Samsung EVO Pro 64GB (U1) - 70.07MB/sec Read - 17.81MB/sec Write (Only 4.9GB Free)
Samsung EVO Plus 128GB (U3) - 63.08MB/sec Read - 27.12MB/sec Write (Only 65.9GB Free)
For the heck of it tried the transfer rates on the PC for the 2 cards as well.
Samsung EVO Pro 64GB (U1) - 86.85MB/sec Read - 80.77MB/sec Write (Fresh Format)
Samsung EVO Plus 128GB (U3) - 87.04MB/sec Read - 82.27MB/sec Write (Fresh Format)
Though got to say while cards neck and neck, small file writes where 5x greater on the new U3 card (.5MB/sec vs 2.5MB/sec) on 4k writes.
Hey everybody,
did somebody else notice that the microSD chipset/bus on this device is absolutely horrible?
I bought a SanDisk extreme plus 64 GB card rated for UHS-I U3 V30 A1 class with up to 100 Mb/s sequential read and up to 90 Mb/s sequential write. According to several websites that card actually gives that performance almost entirely.
I bought that card for my Nintendo switch but tested it on my Moto Z2 force. Shockingly the card doesn't even reach 40 Mb/s on either seq read nor write.
Putting that same card in my old Motorola Z it yields 86 Mb/s read and 68 Mb/s write speed. The IOPS are also massively higher on the older phone.
I tried different schedulers, different read ahead values aswell and cfq offered the best performance.
Using the same settings on my Z2 force makes no difference, still abysmal performance.
Can someone confirm that this isn't specific to my phone alone?
Kind regards
regenwurm16 said:
Hey everybody,
did somebody else notice that the microSD chipset/bus on this device is absolutely horrible?
I bought a SanDisk extreme plus 64 GB card rated for UHS-I U3 V30 A1 class with up to 100 Mb/s sequential read and up to 90 Mb/s sequential write. According to several websites that card actually gives that performance almost entirely.
I bought that card for my Nintendo switch but tested it on my Moto Z2 force. Shockingly the card doesn't even reach 40 Mb/s on either seq read nor write.
Putting that same card in my old Motorola Z it yields 86 Mb/s read and 68 Mb/s write speed. The IOPS are also massively higher on the older phone.
I tried different schedulers, different read ahead values aswell and cfq offered the best performance.
Using the same settings on my Z2 force makes no difference, still abysmal performance.
Can someone confirm that this isn't specific to my phone alone?
Kind regards
Click to expand...
Click to collapse
It's not your phone. Mine is slow reading my 400gb SanDisk. My v30+ is slow in this too.
There was some testing done on notebookcheck.net on both of those models and the SD card behavior wasn't nearly as pronounced but they used a different reference card. I don't think it's horrible but I don't expect to get anything near the max values in real life situations
For both models I asked Motorola support about the specific classification of the SD card bus but they never could get anymore specific than UHS-I. Questioned if only UHS-I U1 or U3 or possible max speeds could not be answered for both phones.
I think it's pathetic for a 800€ phone to be outdone immensely by its 650€ predecessor in that regard.
The Z2 force itself is in anyway better than the Moto Z but it's still annoying that they downgraded the SD card reader so heavily.