Greater Performance Choices |
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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.
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Marks |
Speed |
Operable Under... |
Applications |
| Speed Class |
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≥10 MB/s |
High Speed Bus I/F |
Full HD video recording |
| HD still consecutive recording |
 
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≥6 MB/s; ≥4 MB/s |
Normal Bus I/F
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HD ~ Full HD video recording |
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≥2 MB/s |
SD video recording |
 UHS Speed Class |
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≥10 MB/s |
UHS-I Bus I/F |
Full higher potential of recording real-time broadcasts and capturing large-size HD videos |
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UHS-I Bus Interface and UHS Speed Class |
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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. |
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| 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 ) |
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UHS-I Memory cards and Host Devices Speed |
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| Memory Card |
Host Devices |
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SDHC UHS-I
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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
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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 |
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| Memory Card |
Host Devices |
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SDXC UHS-I
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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. |
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UHS-I Interface Compatibility |
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SDXC, SDHC, SD Memory cards and Host Device Compatibility |
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* 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.
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| Memory Card |
Capacity |
Host Product |
| SDXC / microSDXC |
SDHC / microSDHC |
SD / microSD |
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64GB to 2TB |
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X |
X |
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4GB to 32GB |
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X |
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2GB or less |
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