SD Express

SD Express

An SD card category that uses the PCI Express (PCIe) and NVMe interfaces. Introduced in 2018, SDHD, SDXC and SDUC cards are available as SD Express cards, which are backward compatible with the myriad SD devices in use.

Over the PCIe bus, an SD Express card plugged into an SD Express host can reach up to 985 MB/sec, a 50% increase over the UHS-III bus in full-duplex mode. See SD card classes, SD card, PCI Express and NVMe.

microSD Express
Full-size SD Express cards did not take the world by storm, but the microSD version, which debuted in 2019, is expected to make a splash. Offering the same speed increase as SD Express, the microSD format is very popular and used in many devices. See microSD.


SD Express Logos
As time marches on, more Express logos will appear on cards. (Images courtesy of SD Association, www.sdcard.org)
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References in periodicals archive ?
The new format employs the NVMe 1.3 and PCIe 3.1 interfaces, similar to SD Express formatthat is used in PCs to power SSDs.
Version 7.0 specification for SD cards is composed of two new formats: SD Express and SD Ultra Capacity (SDUC).
"With SD Express, we're offering an entirely new level of memory card with faster protocols turning cards into a removable SSD.
The SD Association has announced a new format called SD Express which boosts the maximum capacity of SD cards from 2TB to 128TB, Engadget reported.
The new SD Express format will theoretically allow you to store over 25,000 HD movies, 256 million photos, or 25.6 million songs.
The new card standard will be called SD Ultra-Capacity (SDUC) and will use a new speed standard called SD Express. While the challenge of making this card "relatively" affordable is a huge hurdle, there's also the potential challenge of compatibility.
SD Express handles content-distribution duties by cloning.
GSS SD Express allows teachers to add data to students' handheld computers.
"No-one knows whether that will produce a solution but the EFL has committed that it will contribute to the process wherever required." EFL involvement "The Trust and SD expressed understanding of the EFL's position but urged them to do all they can to bring about a solution to the problems facing the club to secure its long-term future in Coventry.
Subgroups Healthy Mild (self-etching techniques) (1) Self-etch (SE) 390.83 [+ or -] 101.04 312.18 [+ or -] 100.69 (2) NaOCl/SE 376.64 [+ or -] 100.82 335.55 [+ or -] 100.11 (3) NaOCl/SE + NaAg 361.94 [+ or -] 100.53 369.63 [+ or -] 101.95 Subgroups Moderate Severe (self-etching techniques) (1) Self-etch (SE) 296.14 [+ or -] 103.87 311.30 [+ or -] 105.23 (2) NaOCl/SE 320.57 [+ or -] 106.71 372.28 [+ or -] 105.54 (3) NaOCl/SE + NaAg 357.48 [+ or -] 104.24 286.57 [+ or -] 103.13 Results show means [+ or -] SD expressed in nanometers.
Sd expressed his pride in Natco's long-term partnership with Mercedes-Benz.
In that case SD expressed in mmHg is equal to 0.71 mmHg and the uncertainty (U) of proposed non-invasive absolute ICP measurement device is U = 2SD = [+ or -]1.42 mmHg.