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

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)”

Sandisk ImageMate speed test

результаты работы Flash Memory Toolkit (15MB files) на Sandisk ImageMate


Sandisk-1GB-small
Sandisk-4GB-C6-EIII-small z_sdhc_speed_Sandisk-C6E3-4GB
apacer-8gb z_sdhc_speed_Apacer-C6-8GB
Transcend-8GB-C6-small z_sdhc_speed_Transcend-C6-8GB
Sandisk-16GB-C10-E30-small z_sdhc_speed_Sandisk-C10E30-16GB

Заметен серьёзный прирост производительности на карточке “extreme 30MB/s” у остальных результат незначительно лучше или такой же.

SanDisk Extreme 30MB/s test

Купил новую SD карточку SanDisk SDHC Extreme 30MB/s* 16GB class 10 и решил сравнить ее скорость с другим карточками.


т.к. результат оказался неожиданным, я перепроверил скорости всех своих кардридеров.
Transcent M3, Sandisk MicroMate, Apacer (APAM250B) показывают одинокувую скорость, китайский же SIYOTEAM медленее остальных на 1-2 МБ/с.


Дальше тестировалось с использованием только Sandisk MicroMate.


SanDisk-MicroMate


Тест “Мелкие файлы” это 1916 файлов в 717 папках общим размером 21.8 МБ.
Тест “Большой файл” это образ диска размером 3.7 ГБ для карт 4ГБ и более.


Card Read (MB/s)

large file

Write (MB/s)

large file

Read (MB/s)

small files

Write (MB/s)

small files

Delete (1/sec)
SanDisk SD 1GB 10.2 4.8 2.3 0.1 39
SanDisk SDHC Extreme III 4GB class 6 19.0 16.5 1.8 0.3 57
Apacer SDHC 8GB class 6 18.9 6.4 1.9 0.2 25
Transcend SDHC 8GB class 6 16.5 10.5 2.3 0.2 61
SanDisk SDHC Extreme 30MB/s* 16GB class 10 19.0 17.7 2.1 0.1 32


что б снять подозрение в том, что все уперлось в производительность USB 2.0


Device Read (MB/s)

large file

Write (MB/s)

large file

Read (MB/s)

small files

Write (MB/s)

small files

Delete (1/sec)
Kingston DataTreveler G2 16GB 21.5 16.1 3.0 0.2 69
WD Passport 500GB 34.5 29.2 3.0 1.0 651


результаты работы Flash Memory Toolkit  (15MB files)


Sandisk-1GB-small x_sdhc_speed_Sandisk-C0-1GB
Sandisk-4GB-C6-EIII-small x_sdhc_speed_Sandisk-C6E3-4GB
apacer-8gb x_sdhc_speed_Apacer-C6-8GB
Transcend-8GB-C6-small x_sdhc_speed_Transcend-C6-8GB
Sandisk-16GB-C10-E30-small x_sdhc_speed_Sandisk-C10E30-16GB