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What is a CFexpress Card?

投稿者 ：VTOP-eMall on

CFexpress, CompactFlash,CFast and XQD memory cards are conducted by CFA (CompactFlash Association). 

CFexpress cards are based on the PCIe® Gen 3 interface and uses established NVMe™ protocols. There are 2 releases of the CFexpress specification: 1.0 and 2.0

KeyFeatures

   Type A  Type B  Type C

FormFactor

  

20.0 x 28 x2.8mm

  

29.6 x 38.5 x3.8mm

  

54.40 x 74.10 x6.0mm

Interface

  

PCIe Gen.3 x1

  

PCIe Gen.3 x2

  

PCIe Gen.3 x4

Protocol

 NVMe 1.3 NVMe 1.3 NVMe 1.3

TheoreticalPerformance

 8Gbps (1GB/s)   16Gbps (2GB/s)   32Gbps (4GB/s)

Format ReleaseDate

  

Feb.28 2019(Ver.2.0)

Apr. 2017(Ver.1.0)

 

Feb. 28, 2019(Ver.2.0)

  

Feb., 2019(Ver.2.0)

 

CFexpress  

CFexpress 1.0 cards are limited to the Type B product size and utilize NVMe™ 1.2 stack.  Compliant CFexpress 1.0 cards will use this logo
CFexpress  

CFexpress 2.0 cards are differentiated by form factor and performance capability improves with  each form factor size in conjunction with the number of PCIe® lanes.

Only CFexpress 2.0 cards may offer CFA-tested video performance guarantee (VPG)

 
  CFexpress A  

CFexpress Type A cards support speeds up to 1000MB/s.  Compliant CFexpress Type A cards will use this logo.
  CFexpress B

CFexpress Type B cards support speeds up to 2000MB/s.  Compliant CFexpress Type B cards will use this logo

 
  CFexpress C  

CFexpress Type C cards support speeds up to 4000MB/s.  Compliant CFexpress Type C cards will use this logo

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