The SD Association (SDA) is a non-profit organization established in 2000 and composed of around 800 tech companies (including Apple, Canon, Microsoft, and Google) that develop and promote the strict industry standards for SD cards. Full-size SD and microSD cards comprise more than 80% of the memory card market, and now the SDA says that the newest iteration is the biggest evolution since their introduction. The SD 9.1 Specification defines a new speed class and multi-stream access for SD Express Cards, so let’s see what it’s all about! microSD Express card is twice as fast Speed class defines a card’s minimum write speed. This distinction is especially important when recording video, which requires a constant minimum write speed during recording. Now, the SD Association has updated its specs with new PCIe standards, allowing microSD Express to reach speeds up to 2 GB/s. According to the SDA, “the latest generation of microSD Express uses the PCIe interface delivering a 1,969 megabytes per second (MB/s), nearly 2 gigabytes per second (GB/s) speeds by using the PCIe Gen4 x1 lane.” Chart showing the different marks used for identifying Speed Class. Source: SD Association The speed class of a card will also be more clearly indicated so consumers will know what they’re buying. Memory cards showing the Video Speed Class and the SD Express Speed Class. Source: SD Association New speed classes Several speed classes were created by SDA for real-time speed recording: Speed Class, UHS Speed Class, and Video Speed Class. The current...
Published By: CineD - Tuesday, 24 October, 2023