It also serves as a preview of what consumers can expect from SD Express cards appearing in the market over the next few quarters. This review takes a detailed look at the performance of the card in conjunction with Realtek's RTL9211DS card reader reference design. Silicon Motion sampled us its SM2708 reference design (with a 250GB capacity) to put through our rigorous memory cards evaluation suite. The cards from both vendors are based on the Silicon Motion SM2708 controller. Both ADATA and Lexar have announced plans to launch their SD Express cards within the next few quarters. Removable memory cards based on PCIe / NVMe are slowly starting to appear in the market - CFexpress from CFA, and SD Express from the SDA. The products currently servicing this market segment are based on technology standards drafted when SATA was the pinnacle of internal storage performance, but in fact both standards bodies jumped on to the NVMe bandwagon in the late 2010s. There are two main standards bodies in this segment - the SD Association (SDA) and the CompactFlash Association (CFA), with the SDA is responsible for the Secure Digital cards (SD / microSD), and the CFA has the CompactFlash and CFast card markets. Many computing systems (including PCs and smartphones) also employ them to augment the available storage capacity.
#Mass storage controller standard nvm express controller portable
Flash-based removable media, such as SD cards, have a host of use-cases in products ranging from content capture devices to portable game consoles.
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