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Greater Performance Choices
 
Speed Class and UHS Speed Class* symbols indicate minimum video recording performance to ensure smooth video playback. This is important for camcorders, video recorders and other devices with video recording capabilities. The Speed Classes defined by the SD Association are Class 2, 4, 6 and 10.
UHS Speed Class 1 is designed for UHS** devices only.



  Marks Speed Operable Under... Applications
Speed Class ≥10 MB/s High Speed Bus I/F Full HD video recording
HD still consecutive recording

≥6 MB/s; ≥4 MB/s Normal Bus I/F

HD ~ Full HD video recording

≥2 MB/s SD video recording
UHS Speed Class ≥10 MB/s UHS-I Bus I/F Full higher potential of recording real-time broadcasts and capturing large-size HD videos
 
UHS-I Bus Interface and UHS Speed Class
 
UHS-I is the new standard for higher-speed bus interfaces defined by
the SD Association as part of the SD Memory Card Specification Ver. 3.01, which provides up to 104 MB/s performance.

Bus Mode Bus Speed Speed class
UHS-I ( Ultra High Speed )
UP to 104 MB/s UHS Speed Class 1
Conventional
( High Speed or Default Speed )
Up to 25 MB/s
Speed Class 2, 4, 6, 10
( Higher Speed Class covers lower class performance )
 
UHS-I Memory cards and Host Devices Speed
 
      * Read speed
Memory Card Host Devices


SDHC UHS-I

Up to 95MB/s*
+UHS Speed Class 1

The maximum data transfer speed is 95MB/s* when SDHC UHS-I is used with a device supporting UHS-I.

Up to 23MB/s*
+Class 10

The maximum data transfer speed is 23MB/s* when SDHC UHS-I is used with a non UHS-I host device.

Non UHS-I SDHC

Up to 20MB/s*

The performance of Speed Class10 works under current Bus I/F. (not under UHS-I Bus I/F mode)

Up to 20MB/s*
+Class 10

The maximum data transfer speed is 20MB/s when non UHS-I SDHC is used even with a device supporting UHS-I

Memory Card Host Devices

SDXC UHS-I

Up to 95MB/s*
+UHS Speed Class 1

The maximum data transfer speed is 95MB/s* when SDHC UHS-I is used with a device supporting UHS-I.

Up to 23MB/s*
+Class 10

The maximum data transfer speed is 23MB/s when SDXC UHS-I is used with a non UHS-I host device.

The performance of Speed Class 10 works under current Bus I/F.


UHS-I Interface Compatibility
 
Memory Card Host Devices
Host devices compatible with UHS1 Host devices not compatible with UHS1
SDXC & SDHC UHS-I

microSDUHS-I

SDXC, SDHC, SD Memory cards and Host Device Compatibility
 
 
* SDXC Backwards Compatibility Configuration
* SDXC memory cards can be used only with SDXC host products.
* SDXC host products can use SD, SDHC and SDXC memory cards.
* SDHC memory cards can be used with SDHC and SDXC host products.
* SDHC host products can use both SD and SDHC memory cards.
Backwards capability is a standard, for example a data format in electronics such as video cameras and computers.
A device is backwards compatible if products designed for the new standard can receive, read, view or play older standards and formats.
 
Memory Card Capacity Host Product
SDXC / microSDXC SDHC / microSDHC SD / microSD
64GB to 2TB

X X
4GB to 32GB




X
2GB or less



 



 
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