Two New Performance Symbols for the Fastest SDXC and SDHC Cards

Posted by at 1:57 am on June 23, 2010

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

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.

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.

Both new symbols are exclusively on SDXC and SDHC products.   Earlier SD memory cards are still interoperable with the newest host devices.   But the new Ultra High Speed (UHS) cards are not backwards compatible with Class 2, Class 4, Class 6 and Class 10 SD card products. For the best performance, users should pair their devices with the corresponding SD memory card.

Below are two great Video from the SD Association on how to pick the correct SD card for your device and use.

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