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SD Association Unveils microSD Express Format That Promises Transfer Speeds of Up To 985 MB/s (engadget.com)
The SD Association has unveiled microSD Express, a new format that will bring speeds of up to 985 MB/s to the tiny memory cards used in smartphones and other devices. From a report: Like SD Express, it exploits the NVMe 1.3 and PCIe 3.1 interfaces used in PCs to power high-speed SSDs. The tech is incorporated onto the second row of microSD pins, so the cards will work faster in next-gen devices while maintaining backward compatibility with current microSD tech. PCIe 3.1 allows for low power sub-states, so the cards will not only offer much (much) higher transfer speeds, but consume less power than regular microSD cards. It'll also open up features like bus mastering, which lets memory cards communicate with other components without going through the CPU first.
microSD Express format supports up to 985 MB/s not 985 Mb/s.
MB/s is megabytes (1,000,000 bytes) per second.
Mb/s is megabits (1,000,000 bits) per second.
References:
https://www.sdcard.org/press/T...
The speed is actually 985 MB/s not 985 Mb/s. The article was wrong. See https://www.sdcard.org/press/T...
Ignore the OP. He's buying cheap Chinese shit. Most reputable cards will happily max out the SD card's current bus for a sustained write across their entire capacity and despite his assertion that NAND is the limiting factor to 7MB/s you'll find most SSDs have either 2 or 4 NAND chips on them and happily crank out several gigabytes per second of data.