08-12-2015 01:17 PM
34 12
  1. Rails Ruby's Avatar
    No, For now no smartphone supports UHS-1, even S5 or HTC ONE(M8) or others and don't expect that devices from year 2014 will support UHS-1 but with snapdragon 810 from there you can expect UHS-1 cuz 810 supports UHS-1 and I think that will appear next summer in 2015.
    04-25-2014 09:53 AM
  2. Ajinkya Datalkar's Avatar
    The answer is you get slightly better results,I had done a comparision between a class 10 non-uhs and a class 10 uhs-1 card and these were the results:
    1)class10 non-uhs:
    2)class10 uhs-1:
    if you are going to use it for swapping memory,then go with class10 UHS-1 and if you are going to use only for just storing data then go for a class 6 or class 10 card. I had tried this on my samsung galaxy s4 (international varient) with sd card tester app and cynogenmod installed.
    sharenep likes this.
    06-13-2014 02:46 PM
  3. sharenep's Avatar
    PLEASE, WHAT IS I9505 mean? How do I know if that is what my Galaxy S4 is? Thanks.
    06-16-2014 11:20 PM
  4. Morphemes's Avatar
    I am naturally suspicious of the so-called professionals, self-proclaimed experts & so on. I find myself skimming through all the various interpretations of the published specs for the galaxy phones, looking for a proper answer to this particular question. I'm scratching my head & suddenly, everything just clicks! I was right all along! These people are all addicted to STOOPID PILLZ!

    Any and all searches along the lines of "samsung galaxy [insert variant] SD specifications" are inherently flawed, because the SD controller IS NOT The Device [name: proper]. What you REALLY need to be looking at is the system chip.

    The S4 uses a Qualcomm Snapdragon 600
    This particular chip supports eMMC 4.51, SATA3, & SD 3.0 (UHS-I)

    There could be some other factor explaining why some people aren't seeing the read/writes speeds they expect (software) but to answer the OP's question... Yes, gosh darn it

    IT DOES!

    The Note 3 has a Snapdragon 800, but the SD spec is the same.
    I happen to own a Note 3 running the latest Hyperdrive rom. I'm using a 32 gig samsung pro UHS-1 microsd card.. and I'm getting 100MB/s+ reads & 60MB/s+ writes.
    Attached Thumbnails Does Galaxy S4 support UHS-1 speeds on UHS-1 microSD cards?-memtest.jpg  
    09-28-2014 10:44 AM
  5. Morphemes's Avatar
    Hope that helps
    09-30-2014 12:40 AM
  6. volatile_uint8_t's Avatar
    Sorry to revive this thread but I found it while searching on google, and if anyone else comes across it they may be misinformed.

    Morphemes, your SD card results are wrong because that is a cached read. It's really hard to accurate results with that app. The only results that are correct are your write speeds.

    After writing to that SD card at 17.09MB/s you system placed that data in the cache located in RAM. Then proceeded to read out of RAM at 736MB/s. The reason why it is not as fast reading out of cache is because it is likely compressed to about 33% size. Additionally for each block read from the cache the system needs to verify the block on disk is identical. It does this by only reading the blocks metadata from the SD Card then comparing it to the block read from cache.

    To get accurate results, your phone pretty much needs to be out of memory so there is no room to catch it.

    Here is an i545 Galaxy S4. The external SD card is a UHS-I Samsung EVO Class 10 64GB (MB-MP64DA/AM) that was advertised getting 45MB/s that I'm pretty disappointed in. I haven't once broke 20MB's on either my computer or Phone.

    These results are in a dirty state with the memory full and only able to cache little. (Notice there is still the app warning of a Cached Read):
    Does Galaxy S4 support UHS-1 speeds on UHS-1 microSD cards?-vodpy7n.jpg

    Now using the 3C Toolbox Pro to clear the ram with the settings shown on the left, the system will be able to cache the data then get absurd read speeds as shown on the right. I did the tests starting from bottom to top, notice it gets slower as more cache is filled:
    Does Galaxy S4 support UHS-1 speeds on UHS-1 microSD cards?-r5httjo.jpg Does Galaxy S4 support UHS-1 speeds on UHS-1 microSD cards?-xzq4wq7.jpg

    I have no idea how it determines when to clear the caches.
    11-10-2014 03:59 AM
  7. Steelheart007's Avatar
    I dont know if this method is accurate or not.For this i use system monitor app.suppose i am copying file from pc to sd sdcard or from internal sd card to external micro sd card or whatever ,whenever read or write process is going on in internal sd or micro sd, and i wanted to check speed at which it is going on, i go into system monitor app, swipe right or left until i reach disk i/o page, then it shows speed of ongoing read and write processes witth a nice graph. the app is also useful in monitoring many other aspects of smartphone like battery stats, cpu freqs ,ram , network , and cpu usage of individual apps etc. have a nice day
    12-18-2014 02:21 PM
  8. Brcobrem's Avatar
    I wanted to know this also as there is a big price difference in the Class 6 and Class 10 is about $50 locally.
    So I called Samsung. It took them some time but they pulled up their specs.
    They only support a Class 2-6. They will use any of them but can only write / read from Class 6 and down.

    I realize this post is a little old, but I thought this might help someone:

    A user with a Galaxy S4 running CM11 tells me that recently, their external Micro SD sometimes shows no files whatsoever, and sometimes the sd disappearing completely. I verified that in TWRP (custom recovery), the card was not shown either (ie. nothing to mount or unmount). I found that sometimes if I power off the phone and let it sit about 5 minutes, the sd would return, but sometimes it wouldn't. Ditto if I removed the sd and re-inserted. I finally look at the card and it's a UHS-1. I just happen to have a regular Class 10 sd sitting on the shelf so . . .

    I remove the UHS-1, insert it into a Win8.1 PC, but no imaging software I had would recognized the sd. Ditto with XP. Btw, Win XP will not see this sd correctly and tell you it is not formatted, so don't use XP for any of this. So . . . I simply copy everything to a folder in Win8. I.

    I then use Diskpart upon the UHS-1 to get the disk ID and Windows Explorer to get the volume label. I then use Diskpart to apply the old ID to the new Class10, and Explorer to apply the old volume label to the new Class10. Don't know if this was all necessary, but I didn't want any complaints from the OS that the FAT32 disk had been physically changed.

    The user now says the problem was solved: no more missing files or missing sd. So it would appear that a standard Class 10 works in the S4. Time will tell on that and I'll reply back if I find it's not stable.

    It's interesting to note that that the UHS-1 was in place for almost two years before problems started surfacing. I just used FormatSD to apply quick format, and ran a destructive surface check on it with no errors. It may well be that the UHS-1 is just failing intermittently relatively early in it's life. I do know that there was a lot and frequent file copies and deletes (ie. music and pics) to that sd.

    Regards . . .
    05-26-2015 04:06 PM
  9. hasanfikri's Avatar

    I've tried using microSD sandisk extreme 32gb UHS-I class 3 on my Samsung S4 (i9500), the result is satisfied.
    I was used the SDcard test application androbench completed with random test, and here the result :

    Does Galaxy S4 support UHS-1 speeds on UHS-1 microSD cards?-screenshot_2015-08-12-23-30-59.jpg

    If you try using androbench application, please make sure you choose the external SD ( /storage/extDsCard ) before run the application, so you will find the right result.
    08-12-2015 01:17 PM
34 12

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