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Does anyone know the specific read and write megabytes per second limitations of our cpu's? More specifically i am wondering if we would benefit from a class 10 or if anything beyond a class 6 or are we wasting our money cuz the phone's cpu cant match the read and write speeds of a class 10. Also does anyone know how accurate sd card speed tester app is? I used it and it said with the stock class 2 sd card that it was reading 13mb per sec and writing 7mb per sec. If that is accurate then to my knowledge We would benefit from atleast a class 6 or higher.
I've looked for specs on this as well, but can't find anything, just that the max size supported is 32gb microsdhc. ;\ Would you really want to spend the money on a Class 10 card, though? $90 bucks for 16gb? No danke.
jbadboy2007 said:
Does anyone know the specific read and write megabytes per second limitations of our cpu's? More specifically i am wondering if we would benefit from a class 10 or if anything beyond a class 6 or are we wasting our money cuz the phone's cpu cant match the read and write speeds of a class 10. Also does anyone know how accurate sd card speed tester app is? I used it and it said with the stock class 2 sd card that it was reading 13mb per sec and writing 7mb per sec. If that is accurate then to my knowledge We would benefit from atleast a class 6 or higher.
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The CPU itself would not be the limiting factor.
One tip: Sandisk's most expensive Class 10 flash is NOT the fastest for random-access reads. I've seen benchmarks done in multiple places that show that other brands (mostly sold by Newegg, nothing you can even fantasize about buying in a major retail store) are up to 50% faster.
The paradox is because "class" measures ONLY write speeds, but the way most guys here use it is as a fake hard drive in ways that are more read-intensive. Sandisk's target market isn't performance-oriented owners of high-end Android phones. Their target market is video professionals who only care about reliability and storage-life. As a result, if they have to choose between optimizing for long-term data integrity and raw blazing performance, they'll go for integrity every time as long as write performance is fast enough to meet the standard.
If you're going to walk into a store like CompUSA/TigerDirect and buy flash without reading reviews, your best bet is probably class 6. It's dirt cheap compared to class 10, and isn't much slower than average-benchmarking class 10 when it comes to reads. More to the point, it's cheap enough that if you strike out, you can chuck it and buy a more carefully-researched second card online without hating yourself for the next year. If you spend $15-20 on a mediocre class 6 4-gig card, it's not a big deal. If you spend $120+ on a mediocre class-10 16-gig card, you're basically stuck with it for the next 2 years unless you can unload it on somebody who doesn't know better.
write speeds are the more intensive and slower than read speeds. Kingston sells their products based upon write speeds. sandisk sells upon read speeds. kingston class 10 sd card equals 10 mb write speeds 19 mb read speeds sanddisk class 10 is 10 mb read and 7-8mb write speeds. it takes longer to write data and takes more cpu use. the write speeds are your priority.
Class 10
I have a class 10 Sandisk and it sucks in the nexus one
for some reason if I use the card in a reader it perform ok (10MB WRITE) but in the phone it is painfully slow... and this is true either testing with an SD card test app or by hooking thru the usb cable, so something is wrong and I am not sure it's 100% the card since it perform ok in a card reader...
Doing the same with a class 2 card is transparent, same performance from any interface (USB, Internal).
I have made some test with cluster size if 4K, 16K, 32K and it's the same... The only difference is the card themself, I know they use a new SDHC 3.0 standard, maybe this is the reson why they under perform in the nexus...
jbadboy2007 said:
write speeds are the more intensive and slower than read speeds. Kingston sells their products based upon write speeds. sandisk sells upon read speeds. kingston class 10 sd card equals 10 mb write speeds 19 mb read speeds sanddisk class 10 is 10 mb read and 7-8mb write speeds. it takes longer to write data and takes more cpu use. the write speeds are your priority.
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You are right in regard to write being more intensive than read, especially for MLC flash but AFAIK Class are part of the SD Card standard and are based on WRITE Speed, can you point out where you take this "difference" between 2 major brand, I am not a sandisk fanboy (far from it) but I doubt this is based on anything real...
actually i read in wikipedia that sandisk sells thier products by read speed and kingston sells thier products by write speed.
It's been awhile since I looked at the spec, but the class is the minimum write speed to earn that spec. Most cards seem to exceed this. The only real way to find out real speeds is via independent tests.
Sent from my SPH-D700 using Tapatalk
Are the only 32 gb cards available Class 2? I haven't found anything faster.....
With black friday coming up, I'm looking for a large micro SD card. My main debate is through speed. I want the 128GB Sandisk microSD card, but it's capped to 30MB/s sequential reads, while the 64GB extreme goes up to 80MB/s. Can the tablet take advantage of those higher speeds? I want as little a difference between the internal memory and the external memory as possible. My only concern is 64GB may not be enough, as I download a metric ton of games, and I'm blowing through the internal memory. Basically, I'm asking for buying advice, and this is all very specific to the shield tablet. I have no other intended uses for the SD card.
I have a Samsung 64gb PRO up to 90mb/s and this is the result
Is that what the shield tablet is actually able to write at? If so, then it's worth it for the increased data loading in my games. That's my main concern. Also, how efficient is app2SD type transferring? I want to know if my SD card will be used effectively, or if I will still end up running out of storage space.
Nintonito said:
With black friday coming up, I'm looking for a large micro SD card. My main debate is through speed. I want the 128GB Sandisk microSD card, but it's capped to 30MB/s sequential reads, while the 64GB extreme goes up to 80MB/s. Can the tablet take advantage of those higher speeds? I want as little a difference between the internal memory and the external memory as possible. My only concern is 64GB may not be enough, as I download a metric ton of games, and I'm blowing through the internal memory. Basically, I'm asking for buying advice, and this is all very specific to the shield tablet. I have no other intended uses for the SD card.
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There's a new version of the 128gb that rated 48mb/s. But if you want faster card you can only get them in 64gb. Like the Samsung pro at 90mb/s.
aznmode said:
There's a new version of the 128gb that rated 48mb/s. But if you want faster card you can only get them in 64gb. Like the Samsung pro at 90mb/s.
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I'm afraid to ask how much this new 128GB model is. I can't justify spending $200 on a micro SD solely for tablet storage.
Nintonito said:
I'm afraid to ask how much this new 128GB model is. I can't justify spending $200 on a micro SD solely for tablet storage.
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I got one for my note 4 at $109. Might find good deals on black Friday
http://www.amazon.com/SanDisk-Memor...416866651&sr=1-1&keywords=128gb+micro+sd+card
Unfortunately this isn't available yet in canada
Mine is a Samsung 64gb UHS-1 pro, formatted with NTFS and 64gb cluster size:
Nintonito said:
Unfortunately this isn't available yet in canada
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I see. But I think even at 48mp/s, it's not gonna be the same as internal. If you want something close then the Samsung Pro 64gb with 90mb/s is your best bet. But you are only going to match the read speed. The internal memory's write speed is still faster by 2x. But I really doubt you're going to care about that much if you're just transferring 1-2gb of data to the sdcard. And I'm assuming these are game data? Once those are transferred, it's pretty much done with. Even with my 64gb card now with 11.73 mb/s write speed is plenty fast when I move files to the card. If there are game saves that needs to write to the card, they are gonna be small data. I have about 20 game data on the SD card using Folder Mount and I don't find any issue launching them. The only one that I noticed takes longer is Half Life.
Yeah that definitely sounds good. Faster the better. I want a seamless experience.
Does anyone have experience with PNY sd cards? I saw one for $110 that's a 128GB card with 40MB/s sequential read speeds. How would the card perform, ans would it be enough?
Personally I don't think the extra speed will make that big of a difference. Those benchmarks provide controlled and consistent circumstances which are not realistic. Almost nothing you do on the tablet in normal use will push the read speeds. Tbh write speeds could be more important, as they are typically much slower then write speeds. I'm not saying read speed doesn't matter, but that there is certainly a diminishing return on speeds.
Sent from my SHIELD Tablet using XDA Free mobile app
http://www.amazon.com/Lexar-High-Pe...id=1417018420&sr=8-6&keywords=128+gb+micro+sd
Currently that's the fastest 128 GB card I've found, but you're going to pay for it out the nose. I'd vote to wait a bit and see if you can swing it with at 64 GB UHS card first, like the Samsung Pro series. The faster the card the more seamless the experience will be, and even though use will not mimic the benchmark situation it's still going to take less time to write and read to a very fast card in daily use so it will make a difference for sure.
livinonnoslp said:
http://www.amazon.com/Lexar-High-Pe...id=1417018420&sr=8-6&keywords=128+gb+micro+sd
Currently that's the fastest 128 GB card I've found, but you're going to pay for it out the nose. I'd vote to wait a bit and see if you can swing it with at 64 GB UHS card first, like the Samsung Pro series. The faster the card the more seamless the experience will be, and even though use will not mimic the benchmark situation it's still going to take less time to write and read to a very fast card in daily use so it will make a difference for sure.
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What about if I simply want to use it to load up and watch videos? No gaming nothing else. Is a SanDisk 128GB microSDXC @ 30MB good enough for that? Like say, this one?
http://www.ebay.com/itm/SanDisk-128...05&prg=11353&rk=3&rkt=6&sd=151483862076&rt=nc
Yes that should be fine I just wouldn't put any apps on it at all only media
Thanks for your help guys. Ended up buying a Sandisk UHS-3 64GB card for $100. So far so good. Although android's sd card support for apps is SO BAD.
Because of the ridiculously small internal memory of the gt-s5360 (Samsung Galaxy Y "Young"), I have to keep as many apps as possible on the SD card using link2sd, so I'm interested in all-around SD card performance, not just write speed.
I've been searching the web and can't find actual specs on what the maximum SD card speeds are that this phone can actually use. I know that it supports up to 32GB, and that the fastest SDHC cards (including UHS U1 and U3) should all be 'compatible'. At least, that's what the SDHC spec implies.
wikipedia: /Secure_Digital#Compatibility
But what can the phone actually benefit from? Here are the labels and cutoffs I know of.
wikipedia: /Secure_Digital##Speeds
In other words, I think that if this phone's bus speed is 25MB/s or slower, then there's no difference between, say, how a UHS class 10 and a non-UHS class 10 would perform.
I search around website but couldn't find the specific specs for the micro sd card reader for Shield TV. Does it support UHS-II? I am planning to purchase the Lexar 1800x and want to make sure if I can take full advantage of that card which support read speed up to 300MB/S. I'm also wondering about the writing and reading speed of original storage on 16GB version.
Nvm I contacted Nvidia support, only support UHS-I class 3.
emptydream said:
Nvm I contacted Nvidia support, only support UHS-I class 3.
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by chance, did you ask what the maximum read/write speeds were for on the microsd slot?
unvaluablespace said:
by chance, did you ask what the maximum read/write speeds were for on the microsd slot?
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I assume all the card reader of UHS-1 class3 should have same limit...based on the wiki the limit for that is 104 MByte/s.
I did some further research and seems like random writing and reading speed is actually more important than sequence speed. However, the review on amazon shows Samsung pro plus is best on both random and sequence speed so I guess I will just go with that for now. Laxer is actually only good at reading speed.
http://www.storagereview.com/samsung_evo_plus_microsd_memory_card_review
Based on this one ....San disk is better? I'm confused...
emptydream said:
Based on this one ....San disk is better? I'm confused...
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thats a pretty misleading article, there compairing a 128gb evo plus to other various sized cards. from what ive seen (so far) all premium 128gb cards have relatively low write speeds vs their smaller counterparts.
lexar's generally have the best sequential read/write speed, samsung's usually are better with random read/write, and sandisk is definitely solid too.
for example
lexar 64gb 633x sequential read/write 93.36 / 48.09 MB/s
lexar 128gb 633x sequential read/write 73.17 / 22.16 MB/s
results are basically the same for other manufacturers.
trevor112358 said:
thats a pretty misleading article, there compairing a 128gb evo plus to other various sized cards. from what ive seen (so far) all premium 128gb cards have relatively low write speeds vs their smaller counterparts.
lexar's generally have the best sequential read/write speed, samsung's usually are better with random read/write, and sandisk is definitely solid too.
for example
lexar 64gb 633x sequential read/write 93.36 / 48.09 MB/s
lexar 128gb 633x sequential read/write 73.17 / 22.16 MB/s
results are basically the same for other manufacturers.
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I see, I ordered samsung 64gb pro plus... Hope it will be good~
emptydream said:
I see, I ordered samsung 64gb pro plus... Hope it will be good~
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Definitely a fast card read/write was a bit faster than 80/40 MB/s iirc.
I haven't ran any legit benchmarks on shield yet, but regardless of the sd card i haven't really seen write speeds over 12-15 MB/s while transferring from internal to sd with file managers, ES specifically.
So im thinking internal storage isn't particularly fast, just like on the shield tablet. If i get bored I'll run some tests and see what I come up with
I haven't found a device that's not a camera that support this format yet.
^^ yeah pretty much. even if they call it out. real world speeds dont seem to get there. outside of HD cameras
The microsd reader is UHS-I so you will spend money for nothing. No matter how fast the external storage is you still depend on the speed of the internal storage which is gong to be the bottleneck when you run the OS and apps. 4K video needs 25Mbps and UHS-I can deliver easily. Same story if you read from USB 3 ports. I don't know the speed of the internal storage but it should be at the commercial level of the beginning of 2015.
emptydream said:
I search around website but couldn't find the specific specs for the micro sd card reader for Shield TV. Does it support UHS-II? I am planning to purchase the Lexar 1800x and want to make sure if I can take full advantage of that card which support read speed up to 300MB/S. I'm also wondering about the writing and reading speed of original storage on 16GB version.
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emptydream said:
I see, I ordered samsung 64gb pro plus... Hope it will be good~
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What's your read/write speed with the pro plus? I got the same, I get 60~ r/w.
I ordered 500gb version...I did get the card for my phone lol but like 40s speed sad
I've read that with Samsung Phones, Samsung SD cards work perfectly with.
but which one? Samsung Pro Plus or Evo Plus? is there any limitations on what SD card I can put on the s7?
Evo Plus has Read: 80MB/s Write: 20MB/s
Pro Plus has Read: 95MB/s Write: 90MB/s
Price doesnt matter.
thanks
I just bought a pny elite performance card from pcworld. £39.99 tested at 68MB/s read 52MB/s write in the s7. Will do for now!
Samsung Pro Plus is one of the fastest card out. Last week Samsung had the 64GB for $35. I'm waiting on for that price. No rush for me to get one.
Samsung Pro Plus or you can get the 128GB Lexar 1800x that has fast UHS-I speed like the Samsung yet also has support for UHS-II for *much faster* speed when using the card with external USB3 for transferring files. Am using the Lexar 1800x INSIDE the phone and transferred many GBs of files fast. Naturally if I used the card outside the phone environment (read: in the USB 3.0 adapter) it would have been about 2x to 3x faster. The Lexar 1800x is the fastest card out there right now, will handle the next gen when phone support UHS-II, and... if you're like me and have the need for speed
They also make a 64GB version.
http://www.amazon.com/gp/product/B0...as2&tag=enjoythemusic&linkId=LSJ7BGJMEO47OI3C
enjoythemusic said:
Samsung Pro Plus or you can get the 128GB Lexar 1800x that has fast UHS-I speed like the Samsung yet also has support for UHS-II for *much faster* speed when using the card with external USB3 for transferring files. Am using the Lexar 1800x INSIDE the phone and transferred many GBs of files fast. Naturally if I used the card outside the phone environment (read: in the USB 3.0 adapter) it would have been about 2x to 3x faster. The Lexar 1800x is the fastest card out there right now, will handle the next gen when phone support UHS-II, and... if you're like me and have the need for speed
They also make a 64GB version.
http://www.amazon.com/gp/product/B0...as2&tag=enjoythemusic&linkId=LSJ7BGJMEO47OI3C
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Awesome can you post your read write speeds? I was considering this card. It was this or the new Sandisk with UHS-II.
enjoythemusic said:
Samsung Pro Plus or you can get the 128GB Lexar 1800x that has fast UHS-I speed like the Samsung yet also has support for UHS-II for *much faster* speed when using the card with external USB3 for transferring files. Am using the Lexar 1800x INSIDE the phone and transferred many GBs of files fast. Naturally if I used the card outside the phone environment (read: in the USB 3.0 adapter) it would have been about 2x to 3x faster. The Lexar 1800x is the fastest card out there right now, will handle the next gen when phone support UHS-II, and... if you're like me and have the need for speed
They also make a 64GB version.
http://www.amazon.com/gp/product/B0...as2&tag=enjoythemusic&linkId=LSJ7BGJMEO47OI3C
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wowzah, too out of budget lol. but a nice SD card. I was thinking of $40-$60 AUD.
ekjl said:
Awesome can you post your read write speeds? I was considering this card. It was this or the new Sandisk with UHS-II.
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A site says, "The Lexar 1800x microSD card was tested in several UHS-I and UHS-II card readers. In UHS-II card readers the 1800x microSD card reached 272.3 MB/s sequential read speed, just passing its 270MB/s quoted read speed. Sequential write speed measured 222.2 MB/s, slightly less than the 245 MB/s rating. In UHS-I card readers, the 1800x card reverted to UHS-I mode and was limited to 96.5 MB/s read and 77.5 MB/s write speeds. Still fast, but not quite as fast as the fastest UHS-I microSD cards." Have not tested it in the phone yet it seems very fast.
Here's another site review diff than the one above http://www.realhardwarereviews.com/lexar1800x/7/
---------- Post added at 10:45 AM ---------- Previous post was at 10:40 AM ----------
PS: If you never see yourself using UHS-II and just keeping the card in the phone then the Samsung card is probably best bang for buck. I move some big files around (pro video and pro audio both in pure lossless) so being able to use the card via USB 3.0 makes life easier plus the next gen of phones might support UHS-II and thus I can keep the existing data on card and not have to data migrate.
enjoythemusic said:
A site says, "The Lexar 1800x microSD card was tested in several UHS-I and UHS-II card readers. In UHS-II card readers the 1800x microSD card reached 272.3 MB/s sequential read speed, just passing its 270MB/s quoted read speed. Sequential write speed measured 222.2 MB/s, slightly less than the 245 MB/s rating. In UHS-I card readers, the 1800x card reverted to UHS-I mode and was limited to 96.5 MB/s read and 77.5 MB/s write speeds. Still fast, but not quite as fast as the fastest UHS-I microSD cards." Have not tested it in the phone yet it seems very fast.
Here's another site review diff than the one above http://www.realhardwarereviews.com/lexar1800x/7/
---------- Post added at 10:45 AM ---------- Previous post was at 10:40 AM ----------
PS: If you never see yourself using UHS-II and just keeping the card in the phone then the Samsung card is probably best bang for buck. I move some big files around (pro video and pro audio both in pure lossless) so being able to use the card via USB 3.0 makes life easier plus the next gen of phones might support UHS-II and thus I can keep the existing data on card and not have to data migrate.
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I actually want to know what kind of speed the S7 gets with this card in it. From some other post I read someone was saying the reader in the S7 is not that great.
I did a test and it was around 70 read and 60 write. Seems the bottleneck might be the phone as saw another test with the SanDisk Extreme Pro on XDA and it was about the same speeds. Keep in mind that, for me, Lexar 1800x will also be used outside the phone environment so the UHS-II will be very useful. YMMV.
What happens when you insert an 256GB Sd
Officially Samsung says we can expand upto 200GB of external storage but unless Samsung intends to make 200GB Sd card, there aren't any of those kinds in the market. i want to take full advantage of the expandable memory but 126Gb won't be enough so your opinions would help greatly. Can pop in a 256Gb Sd card
So I went and bought the Samsung Pro Plus 32GB. hopefully comes here before my S7 Edge
Good choice of card. I have always used Samsung cards with no problems. Got my Edge yesterday. I've had a bunch of phones, including the latest Iphones and this tops them all easily. Enjoy.
This is all being discussed over in the accessories forum, we should probably continue the discussion over there...
http://forum.xda-developers.com/s7-edge/accessories/suggestions-microsd-t3321569