CFexpress

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. 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.

CFexpress
A 256GB CFexpress Type B card
Media typeMemory card
Read mechanism
  • Type A: 1 GB/s
  • Type B: 2 GB/s
  • Type C: 4 GB/s
Write mechanismVariable
StandardCFexpress standard
Developed byCompactFlash 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 fromXQD card
Released2017
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