Organization SD Association has introduced a new designation for cards that support the ability to work with the video content in the resolution of 4K or 2K.

New designation Ultra High Speed ​​(UHS) Speed ​​Class 3 (U3) will attest to the fact that the above named products are capable of recording video in 4K or 2K. This label can be used for memory cards and SDXC UHS-I/UHS-II devices and SDHC UHS-I/UHS-II. It is noted that the indicated UHS Speed ​​Class 3 products must provide a minimum consistent speed record at 30 MB / s, which can be claimed when shooting or recording video in 4K or 2K. In addition, these devices are fully backwards compatible with existing memory cards SD.

Note card UHS-I can transfer data at speeds up to 104 MB / s, memory card UHS-II up to 312 MB / s.

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