New SD 9.1 Specifications Will Double SD Card Speeds

 

New SD 9.1 Specifications Will Double SD Card Speeds

The PCIe Gen4 standard surpasses the SD 9.1 standard.


Even SD cards with the fastest speeds are still very slow. 8K video recording, portable PC gaming, and other technologies that constantly require faster data transfer speeds and more dependable storage face significant challenges as a result. The SD Association has therefore announced its new SD 9.1 specification, which achieves a data transfer rate twice as fast as any SD card currently in use, in order to address the issue. High-end SD cards used to be restricted to speeds of 985 MBps or less and used PCIe Gen3 connectivity. With a maximum card speed of 1.9 GBps and PCIe Gen4 connectivity, the new SD 9.1 specification offers plenty of bandwidth for 8K video files, video games, and other bloated media. Of course, you don't have to be a huge nerd or a videographer to appreciate SD 9.1. A PCIe Gen4 connection will feel noticeably faster for even small file transfers.

But heat rises in proportion to speed. Additionally, SD cards need to be throttled—transfer speed is momentarily lowered to help cool things down—when they get too hot. While the card is protected, this can interfere with an ongoing file transfer or recording. The SD 9.1 spec includes new power management thresholds and thermal performance enhancements, such as the ability for a host device (camera, game console, etc.) to control the internal temperature of an SD card, to prevent throttling and maintain continuous speeds.

It's interesting to note that multi-stream recording reliability is increased by SD 9.1. Although the specifics are a little unclear, the general idea is this: Multiple cameras or other sources of simultaneous recording can be managed more effectively with SD 9.1.. If you would like more information on this specific topic, have a look at the SD 9.1 white paper.

The SD Association is introducing four new speed classes for the current SD Express card formats along with SD 9.1. It is simpler to recognize and purchase for an SD card with the help of these speed classes (SD Express Speed Class 150, Speed Class 300, Speed Class 450, and Speed Class 600). Megabytes per second (MB/s) is the transfer speed indicated by the number in each speed class. These cards will be printed with a pill-shaped icon that has the letter "E" and the speed class number on it. There is no release date for the new SD 9.1 specification. Note that in order to utilize the speed, thermal, and power improvements, a host device needs to support the SD 9.1 specification. View the SD 9.1 white paper or read the SD Association blog for more details.Source: PC World via SD Association

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