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Wednesday, June 23, 2010
SD Association Defines New High-Speed Performance Options for SDXC and SDHC Memory Cards and Devices

The SD Association announced today two new high-speed performance symbols for the fastest SDXC and SDHC devices and memory cards.

The first symbol identifies products with bus-interface speeds up to 104 Megabytes per second for greater device performance. The second symbol identifies SD memory cards and products with a performance option allowing real-time video recording.

New SD memory cards and devices bearing the following new performance symbols may now begin entering the marketplace:

- The new Ultra High Speed (UHS) symbol can be found exclusively on SDXC and SDHC products. SDXC or SDHC products with the UHS-I symbol offer the fastest bus-interface speeds available today, capable of supporting data transfer speeds up to 104 Megabytes per second. UHS-I quadruples the existing maximum possible speed of 25 Megabytes per second. UHS bus interfaces are backwards compatible. SDXC UHS-I and SDHC UHS-I memory cards achieve greatest performance when paired with a UHS-I device and allow consumers to record HD resolution videos, plus perform other simultaneous recording functions.

- The new UHS Speed Class symbol can be found exclusively on SDXC UHS-I and SDHC UHS-I products. UHS Speed Class 1 designates SD memory cards and products with a performance option designed to support real-time video recording. This symbol will be found on SDXC UHS-I or SDHC UHS-I memory cards. Consumers can realize the full potential of recording real-time broadcasts and capturing videos using a digital video camera by pairing their devices with UHS Speed Class 1 memory cards.

- The existing Speed Class symbols for non-UHS SD, SDHC and SDXC products are Class 2, Class 4, Class 6 and Class 10. They refer to the minimum write speed performance of the memory card. The symbols may be found on memory cards and devices, including video and digital cameras.

For greatest performance, users should pair their devices with the corresponding SD memory card.

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