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Old December 2nd, 2011, 02:04 PM   #1 (permalink)
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Default SDcard speed

My Rezound came with a 16gb class 4 microSD card. I'm wondering what the fastest speed the device can write to the card is. Will upgrading to a class 6 or class 10 microSD card make reading data faster?

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Old December 2nd, 2011, 02:20 PM   #2 (permalink)
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I had a Class 10 ADATA 16GB sdcard in my last phone so I swapped it out for this one and noted quite an improvement while loading the Gallery to view images, or when PowerAmp scans folders for my music library.
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Old December 2nd, 2011, 02:21 PM   #3 (permalink)
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I read in another forum that a guy has a class 10 card in the Rezound. Your mileage may vary. I don't know if the Rezound hardware can write as fast as the card will allow though.
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Old December 2nd, 2011, 02:54 PM   #4 (permalink)
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Originally Posted by thornev View Post
I read in another forum that a guy has a class 10 card in the Rezound. Your mileage may vary. I don't know if the Rezound hardware can write as fast as the card will allow though.

I have a PNY 32GB Class 10 and have noticed a huge improvement over the class 4 that came with this phone. When transferring files via USB, the write speed seems to fluctuate between 8Mb /s and 10.5 Mb /s. The class 4 that came with this phone would register between 2Mb /s and 3.5 Mb /s.
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Old December 2nd, 2011, 03:59 PM   #5 (permalink)
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I have a PNY 32GB Class 10 and have noticed a huge improvement over the class 4 that came with this phone. When transferring files via USB, the write speed seems to fluctuate between 8Gb /s and 10.5 Gb /s. The class 4 that came with this phone would register between 2Gb /s and 3.5 Gb /s.
I know that transferring via USB will be faster with a higher class, but I'm wondering about the phone's read/write speed. I'd like to upgrade my sdcard, but I don't want to waste money on a higher class if it's not going to improve performance.

Amazon has some good deals on 32 gb microSD cards class 6:
Komputerbay 32GB MicroSD SDHC Microsdhc Class 6 with Micro SD Adapter and USB Reader - $40

I tried searching to find the phone's data access speed to sdcards, but couldn't find any info.

Does anybody have personal experience with increasing the class on the sdcard and noticing improved performance? Does it improve performance for apps which are on the sdcard? What about other scenarios?
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Old December 2nd, 2011, 11:26 PM   #6 (permalink)
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How can it transfer even 1 mb/s since usb 2.0 is only rated at 480 mb/s?
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Old December 3rd, 2011, 12:15 AM   #7 (permalink)
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Originally Posted by anbageorge View Post
I know that transferring via USB will be faster with a higher class, but I'm wondering about the phone's read/write speed. I'd like to upgrade my sdcard, but I don't want to waste money on a higher class if it's not going to improve performance.

Amazon has some good deals on 32 gb microSD cards class 6:
Komputerbay 32GB MicroSD SDHC Microsdhc Class 6 with Micro SD Adapter and USB Reader - $40

I tried searching to find the phone's data access speed to sdcards, but couldn't find any info.

Does anybody have personal experience with increasing the class on the sdcard and noticing improved performance? Does it improve performance for apps which are on the sdcard? What about other scenarios?
Other than what I posted above, I would say that reading and writing to my SD card **seems** faster than with the original SD card. I didn't test before I swapped, but there are SD card benchmarking apps like SD Tools and SD Tester. Here's a market link:

https://market.android.com/search?q=SD+Card+Tester&so=1

In performing benchmarks on my phone now, the phone appears to write between 9 and 10 MB /s and read between 18 and 19 MB /s. Like I said, I didn't run these benchmarks before I swapped cards, so I can't compare results.
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Old December 3rd, 2011, 12:26 AM   #8 (permalink)
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How can it transfer even 1 mb/s since usb 2.0 is only rated at 480 mb/s?

Not sure I follow your question. USB 2.0 maxes out at 480 Mbits/s, or 60 Mbytes/s (8 bits = 1 byte). Why would it not be able to transfer 1Mbyte/s, or 1/60th of its maximum rated speed?
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Old December 3rd, 2011, 12:00 PM   #9 (permalink)
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Not sure I follow your question. USB 2.0 maxes out at 480 Mbits/s, or 60 Mbytes/s (8 bits = 1 byte). Why would it not be able to transfer 1Mbyte/s, or 1/60th of its maximum rated speed?
maybe he meant 1 gb/s since i believe some did state they were transferring that fast??
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Old December 3rd, 2011, 12:39 PM   #10 (permalink)
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maybe he meant 1 gb/s since i believe some did state they were transferring that fast??
Could be, I didn't see anyone claiming any GB/S transfer speeds- I must have missed it. If so, I agree; I doubt anyone is seeing GB/S transfer speeds over USB 2.0.
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Old December 3rd, 2011, 10:09 PM   #11 (permalink)
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Just curious. What's the best price anyone has found so far on a 32 gig SD card for the ReZound?(not overly concerned with which class it is as long as it works reliably)

EDIT:
Nevermind I found a decent deal after sifting through some of the "too good to be true" ones..lol.
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Old December 3rd, 2011, 10:51 PM   #12 (permalink)
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Quote:
Originally Posted by DroidAV8R View Post
I have a PNY 32GB Class 10 and have noticed a huge improvement over the class 4 that came with this phone. When transferring files via USB, the write speed seems to fluctuate between 8Gb /s and 10.5 Gb /s. The class 4 that came with this phone would register between 2Gb /s and 3.5 Gb /s.

This was the quote I was referring to.

I don't know how fast the phone can read/write to a card or even to the internal memory for that matter.
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Old December 4th, 2011, 12:47 AM   #13 (permalink)
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Quote:
Originally Posted by maximus20895 View Post
This was the quote I was referring to.

I don't know how fast the phone can read/write to a card or even to the internal memory for that matter.
You are right. Several nights with little sleep will kill my multitasking ability. I meant Mb/s, not Gb/s. Previous post fixed. Thanks!
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Old December 4th, 2011, 11:26 AM   #14 (permalink)
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Quote:
Originally Posted by DroidAV8R View Post
You are right. Several nights with little sleep will kill my multitasking ability. I meant Mb/s, not Gb/s. Previous post fixed. Thanks!
Thanks!

I was confused and excited! I wanted some Gb/s speeds!
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Old December 4th, 2011, 11:47 AM   #15 (permalink)
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thanks!

I was confused and excited! I wanted some gb/s speeds!
+1!! :d
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Old December 5th, 2011, 06:37 AM   #16 (permalink)
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Here's a Class 10 32 GB SD card at Newegg for $40.00 shipped.

Newegg.com - Wintec 32GB Micro SDHC FileMate Mobile Professional SDHC Model 3FMUSD32GBC10-R
 
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Old December 10th, 2011, 11:04 PM   #17 (permalink)
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Got my 32 GB class 10 and I recommend everyone don't bother with upgrading to a 32 GB card unless they go with something higher than a class 4. I have some 720p video content and with the class 4, it would take a good second or 2 to jump from one scene to another. With the class 10, much faster and smoother. Spend the extra $5.00 to get a class 10, it's well worth it.
 
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Old December 10th, 2011, 11:18 PM   #18 (permalink)
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Good to know. Thanks
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Old December 12th, 2011, 03:06 AM   #19 (permalink)
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I bought this one:
http://www.amazon.com/gp/product/B005BOMU3K/ref=oh_o01_s00_i00_details

price is meh.. but free shipping. and I scored 15mb/read 9mb/write with AnTuTu
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Old December 13th, 2011, 10:50 PM   #20 (permalink)
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Just want to clear up some misconceptions: Speed class ratings specify minimum write speeds supported by a card, but don't say anything about read speeds. It's easily possible that a good quality Class 2 card would have faster reads than a marginal Class 6 card. It's also possible that the Rezound's microSD interface can't keep up with the very fastest (and most expensive) cards available. More info here.
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Old December 14th, 2011, 12:27 PM   #21 (permalink)
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I get at least 9.0mb/s write and 15mb/read on my 32gb PNY class 10 i bought on amazon for around 40 bucks. according to AnTuTu.
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Old December 14th, 2011, 07:00 PM   #22 (permalink)
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Quote:
Originally Posted by BlueBiker View Post
Just want to clear up some misconceptions: Speed class ratings specify minimum write speeds supported by a card, but don't say anything about read speeds. It's easily possible that a good quality Class 2 card would have faster reads than a marginal Class 6 card. It's also possible that the Rezound's microSD interface can't keep up with the very fastest (and most expensive) cards available. More info here.

I thought write speed is mostly what is affected by SD class, but that was the first thing I noticed on the phone, when I'm playing 720p content and scroll, the video responds a bit faster. With my old 4 class SD card, it took a good couple of seconds to get to the correct scene. I don't think the file structure changed any during the migration from one sd card to another, but who knows. For whatever reason accessing the files on the SD card is a bit faster, which mostly would be a product of the processor. Although an O/S does run faster and smoother if the HD spins at a faster RPM or if SSD (closer to the SD card in structure) card is a newer class of SSD cards. I still think the phone feels a little brisker with the new Class 10, but that's just me.
 
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Old December 14th, 2011, 07:12 PM   #23 (permalink)
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I don't question your experience, just pointing out that read performance depend on the particular brand and model of the SD card, not on its speed class (which only guarantees write performance). Your new Class 10 card may read a lot faster than your old Class 4 card, but some other high end Class 6 card might be even faster.
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Old December 14th, 2011, 09:08 PM   #24 (permalink)
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Here's a Class 10 32 GB SD card at Newegg for $40.00 shipped.

Newegg.com - Wintec 32GB Micro SDHC FileMate Mobile Professional SDHC Model 3FMUSD32GBC10-R
Wow, that card got some bad reviews. I bought one before reading the reviews (silly me) so we'll see.
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Old December 14th, 2011, 09:43 PM   #25 (permalink)
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Quote:
Originally Posted by BlueBiker View Post
I don't question your experience, just pointing out that read performance depend on the particular brand and model of the SD card, not on its speed class (which only guarantees write performance). Your new Class 10 card may read a lot faster than your old Class 4 card, but some other high end Class 6 card might be even faster.
I'm saying you're probably right about the higher class designation. I'm just saying the first thing I noticed was how much faster the video would fast forward to a different scene. It was enough for me to notice a difference.



Quote:
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Wow, that card got some bad reviews. I bought one before reading the reviews (silly me) so we'll see.
I've had mine in for a week with no problems thus far. Make sure you format it first, and you may want to format it on the phone and then dump your old files from the other card. Although someone may want to chime in to see if it may be better to format the card on a computer instead. I'm sure the difference in formatting it on the phone versus on a computer is very minor, but I'm betting there's a propeller-head out there that will pull a "Sheldon"....


 
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Old December 15th, 2011, 12:01 AM   #26 (permalink)
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Gee, TXGoat, that sure looks like a time machine, but it sure isn't Rod Taylor nor Guy Pearce behind the controls.
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The HTC Rezound is the first Beats by Dre smartphone from HTC and will be available on Verizon. It truly is a high-end beast as it boasts a 4.3 inch 720p HD display, a 1.5Ghz processor, 1GB of RAM, an 8 megapixel rear camera with 1080p HD video rec... Read More



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