Top Speed UHS-I U3 microSD 32 GB

Best microSD cards, that may be found today at stores is UHS-I with sequental read/write speed about 80-90 MB/s. To achive this read/write speed cardreaders must support at least UHS-I standard and be connected using fast interface like USB 3.0 or better. Use of old readers will reduce speed to about 20 MB/s. Use of USB 2.0 with UHS-I reader gives about 40 MB/s

microSDHC_SanDisk_32GB microSDHC_Transcend_32GB microSDHC_Kingston_32GB
Price hotline.ua 24.04.2016 37.29$ 22.64$ 18.03$
Sequential (QD=Q32) (MB/s) R 96.20 MB/s
W: 88.60 MB/s
R: 94.02 MB/s
W: 85.66 MB/s
R: 92.27 MB/s
W: 81.81 MB/s
Random  4KB (QD=32) (MB/s) R 8.63 MB/s
W: 3.22 MB/s
R:  10.19 MB/s
W: 1.69 MB/s
R:  11.76 MB/s
W: 1.47 MB/s
Sequental (MB/s) R: 97.31 MB/s
W: 88.49 MB/s
R:  94.81 MB/s
W: 87.46 MB/s
R:  91.23 MB/s
W: 86.20 MB/s
Random 4KB (MB/s) R: 8.63 MB/s
W: 3.27 MB/s
R:  9.98 MB/s
W: 1.45 MB/s
R:  10.37 MB/s
W: 1.44 MB/s

Cards:

SDSDQXP-032G-G46A Sandisk Extreme PRO MicroSDHC (633x) UHS-I U3

TS32GUSDU3 Transcend ULTIMATE microSDHC 32GB (633x) UHS-I U3

SDCA3/32GB Kingston MicroSDHC 32GB UHS-I U3

Cardreader:

Transcend TS-RDF9

Software:

CrystalDiskMark 5.1.2 x64

Additional reading for topic:

http://www.cameramemoryspeed.com/reviews/sd-cards/

https://www.sdcard.org/developers/overview/bus_speed/index.html

 

USB 3.0 SD Cardreaders

Quick comparision of couple USB 3.0 cardreaders with UHS-I support.

usb3_cardreaders

Transcend 300x SDHC UHS-1 U1
TRANSCEND 32 SDHC

TS-RDF5 TS-RDF8 TS-RDF9 FCR-MLG4
Read speed
Sequential Read (QD=Q32) (MB/s) 92.26 88.71 93.56 94.11
Random Read 4KB (QD=32) (MB/s) 6.58 9.39 10.52 10.50
Sequental Read (MB/s) 93.54 93.54 94.17 94.37
Random Read 4KB (MB/s) 6.38 8.92 10.11 10.04
Write Speed
Sequential Write (QD=Q32) (MB/s) 35.05 38.22 37.89 38.25
Random Write 4KB (QD=32) (MB/s) 0.98 1.00 0.78 1.03
Sequental Write (MB/s) 34.81 37.95 37.54 37.33
Random Write 4KB (MB/s) 0.82 0.68 0.88 0.66

Continue reading “USB 3.0 SD Cardreaders”

Modern 32 GB SDHC UHS-1 cards I/O speed test

Some new SD cards speed test

TDK 32 GB SDHC UHS-I Class10 t78717
Transcend Premium 32 GB SDHC UHS-I Class10 TS32GSDU1
SanDisk Extreme SDHC UHS-I Class10 SDSDX-032G-X46

TDK 32GB SDHC TRANSCEND 32 SDHC SANDISK 32GB SDHC
Sequential Read (MB/s) 52.090 88.012 46.786
Sequential Write (MB/s) 14.136 38.338 42.927
Random Read 512KB (MB/s) 44.635 69.408 40.880
Random Write 512KB (MB/s) 0.659 13.426 29.822
Random Read 4KB (QD=1) (MB/s) 2.818 2.540 3.031
Random Write 4KB (QD=1) (MB/s) 1.077 0.509 1.600
Random Read 4KB (QD=32) (MB/s) 2.825 2.736 2.877
Random Write 4KB (QD=32) (MB/s) 0.852 0.423 1.529

Another SD Cards speed test (Transcend, Sandisk)

Yet another SD cards to test:
Sandisk MicroSD 16GB Ultra
Trnscend SD 32GB Class 10

Sandisk-MicroSD-16GB-UHS1-U30
Sequential Read (MB/s) 20,628 20,216 20,483 17,485 20,161 20.339
Sequential Write (MB/s) 18,589 12,979 20,064 11,23 16,82 8.532
Random Read 512KB (MB/s) 19,633 19,618 20,104 17,781 19,707 19,726
Random Write 512KB (MB/s) 4,911 1,465 1,56 1,858 0,681 6.851
Random Read 4KB (QD=1) (MB/s) 3,223 3,323 3,713 5,01 3,627 3,433
Random Write 4KB (QD=1) (MB/s) 0,046 0,012 1,382 0,017 0,006 1.692
Random Read 4KB (QD=32) (MB/s) 3,937 3,562 3,449 4,976 3,674 3.394
Random Write 4KB (QD=32) (MB/s) 0,049 0,013 0,448 0,018 0,006 0.449

* usual notebook embeded SDHC cardreader was used (without Sandisk proprietary 30MB/s or standard UHS-1 mode support)

tested with CrystalMark 3.0.1

SanDisk ImageMate SDDR-289 (UHS-1 USB 3.0)

Reading some old posts:

SanDisk Extreme 30 MB/s SD Card
SanDisk SDDR-199
SD Cards test with SDDR-1999

Now I know what was wrong with 30MB/s SanDisk Extreme SD cards. 30 MB/s was not standard bus speed for SD. So it is seems like only (one?) card reader from SanDisk was supporting that speed. And it was not a good idea to buy 30MB/s cards. Actually theoretical maximum speed for normal and high speed SD cards was 12.5 MB/s and 25MB/s (read as 10MB/s and 20 MB/s in real life). And, by the way, USB 2.0 (480 Mbit/s) has reallife speed for cardreader/hdd/etc ~ 30 MB/s at maximum.

New SD card standards are UHS-1 with 50 MB/s and 100 MB/s (read as 45 MB/s and 90 MB/s) and UHS-II with 156 MB/s and 312 MB/s.

So now some examples of UHS-1 standard in use:

SanDisk ImageMate SDDR-289 (USB 3.0)

SanDisk 16 GB UHS-1 45MB/s

USB 2.0 is not enough to get 45+ MB/s that is why UHS-* cardreaders must be USB 3.0 or other modern high speed interface.

Card formated to exFAT. Cardreaders setting “optimized for performance” in Windows 7.

USB Reader Card Read MB/s Write MB/s
USB 3.0 UHS-1 UHS-1 45MB/s 39MB/s 24MB/s
USB 2.0 UHS-1 UHS-1 45MB/s 26MB/s 16MB/s
USB 2.0 non UHS-1 UHS-1 45MB/s 18MB/s 14MB/s

Card Formatted to FAT32 by SD Formatter 3.1

USB Reader Card Read MB/s Write MB/s
USB 3.0 UHS-1 UHS-1 45MB/s 36MB/s 32MB/s
USB 2.0 UHS-1 UHS-1 45MB/s 25MB/s 20MB/s
USB 2.0 non UHS-1 UHS-1 45MB/s 18MB/s 17MB/s

speed tested with Flash Memory Toolkit “File Transfer (5MB)”

Continue reading “SanDisk ImageMate SDDR-289 (UHS-1 USB 3.0)”