A new SD 8.0 specification has been announced by the SD Association responsible for memory card standards. Technology for SD Express cards promises nearly four times faster data transfer than the current version, including 8K video and other high-traffic operations.
New-generation SD Express cards continue to use the NVMe Express protocol, PCIe Combined with the 4.0 interface. The SD 8.0 specification also provides two options for data transfer rates: the solution can be used based on dual-band PCIe 3.0 or one PCIe 4.0, here it produces data transfer rates of nearly 2 GB / s, and it can also be used with two PCIe 4.0 bands. In this case, the device is close to 4 GB / s, with a peak value of exactly 3938 MB / s. This is a significant improvement over previous generations capable of peak speeds of 985 MB / s.
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SD 8.0 cards based on single-band PCIe 4.0 are given nearly the same physical design as the previous SD 7.0-compliant storage, with the difference that they also have a second row of contacts to serve the above standards. The two-band variants have three rows of contacts. According to SD Assosciation, manufacturers can easily switch to updated specifications, as the cards can still be used with existing test equipment.
The new cards also open the door to a range of new uses, such as “super-slow motion” video, RAW continuous shooting, or 8K resolution or 360 degree video recording and playback. The SD Express specification will also be available on SDHC, SDXC, and SDUC memory cards, which will of course be backward compatible with previous readers.
Gellert is Technology Editor at Counting News Media and contributor at other major tech publications. Her interests includes testing new gadgets and reading.