CFexpress

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CFexpress

A 256 GB CFexpress Type B card
Media type	Memory card
Read mechanism	Type A: 1 GB/s Type B: 2 GB/s Type C: 4 GB/s
Write mechanism	Variable
Standard	CFexpress standard
Developed by	CompactFlash Association
Dimensions	Type A: 20.0×28.0×2.8 mm (0.79×1.10×0.11 in) Type B: 38.5×29.8×3.8 mm (1.52×1.17×0.15 in) Type C: 54.0×74.0×4.8 mm (2.13×2.91×0.19 in)
Extended from	XQD card
Released	2017

CFexpress is a standard for removable media cards proposed by the CompactFlash Association (CFA). The standard uses the NVM Express protocol over a PCIe 3.0 interface with 1 to 4 lanes where 1 GB/s data can be provided per lane. There are multiple form factors that feature different PCIe lane counts.^[1] One of the goals is to unify the ecosystem of removable storage by being compatible with standards already widely adopted, such as PCIe and NVMe. There already is a wide range of controllers, software and devices that uses these standards, accelerating adoption.