Return to Questions What is the SD Express? SD Express memory cards, serve as removable Solid State Drives (SSD), up to 3940 MB/s with PCIe technology with NVMe protocol maintaining UHS-I interface delivering speeds essential for high-resolution content applications such as super-slow motion video, RAW continuous burst mode and 8K video capture and playback, 360 degree videos, and mobile computing devices, gaming systems, multi-channel IoT devices, numerous automotive storage needs, to name a few. It is available on both SDHC and SDXC memory cards and devices. Return to Questions What is UHS? UHS (Ultra High Speed) defines bus-interface speeds up to 624 Megabytes per second with UHS-I (104MB/s), UHS-II (324MB/s) and UHS-III (624MB/s) classification for greater device performance. Return to Questions What are the common applications for Speed Class? Class 2 : H.264 Video Recording, MPEG-4, MPEG-2 Video RecordingĬlass 10/U1/V10 :HD to Full HD Video RecordingĮ150: 4K UHD Multiple Stream Video or Intra* Video recordingĮ300: 4K/8K UHD Multiple Stream Video or Intra* Video recordingĮ450: 8K UHD Multiple Stream Video or Intra* Video recordingĮ600: 8K UHD Multiple Stream Video or Intra* Video recording It is also applicable for any write or read applications that requires an assured minimum constant sequential access performance It is most important for video recording and other applications. Variable speeds are difficult to reliably record streaming content such as video because it requires a constant writing speed.Īll speed class types assures minimum sequential card access performance including multiple stream access (in SD Express Speed Classes) under defined conditions specified in the standard. What is the SD Speed Class? There are four kinds of Speed Classes, “Speed Class”, “UHS Speed Class”, “Video Speed Class.” and “SD Express Video Speed Class.”Īs a characteristic of flash memory, actual transfer speed varies. How will SDXC memory cards change or improve the user experience?.How does the SDXC standard change or improve devices?.Are SDXC memory cards compatible with existing SD devices?.SDXC Standard – (more than 32GB up to 2TB) What is the warranty of my SD memory card?.What is the right size SD memory card for me?.Where can I get the best SD memory card for my device, and what brand do you recommend?.Is there a way to retrieve deleted pictures?.My SD memory card does not seem work in my device, what should I do?.Will the miniSD memory card and microSD memory cards replace the current SD memory card?.What is the difference between the SD memory card and the miniSD memory cards/microSD memory cards?.What is the service life of an SD memory card?.In terms of capacity, what SD standards will be available in the future?.What do you need to transfer data from a memory card to a computer?. Can you save data in different formats such as audio, video, still pictures and documents on a single SD memory card?.How can I identify CPRM and non-CPRM card?.What type of content protection technology is expected to be offered other than CPRM on SD memory card?.Is CPRM applied to all data types stored on the SD memory card?.What are the applications for Speed Class?. As the SD Association is a standards organization and does not make or sell any SD products we are unable to provide product support. If you are a consumer experiencing technical issues with your SD product please contact the manufacturer directly for support.
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