CFexpress Cards
CFexpress cards are based on the PCIe® Gen 3 interface and uses established NVMe™ protocols to offer better efficiency, optimized power and performance for professional imaging and video markets.
There are 2 releases of the CFexpress specification: 1.0 and 2.0
CFexpress 1.0 utilizes NVMe™ 1.2 stack and is limited to a single form factor (Type B).
CFexpress 2.0 employs NVMe™ 1.3 stack while also offering 2 additional form factors.
Type A: 20mm (width) x 28mm (length) x 2.8mm (thickness, including label area)
Type B: 38.5mm (width) x 29.6mm (length) x 3.8mm (thickness, including label area)
Type B cards have the same dimension and connector as XQD cards. Some host devices may choose to update their XQD cameras to also support CFexpress Type B cards
Type C: 54mm (width) x 74mm (length) x 4.8mm (thickness, including label area)
CFexpress Version 2.0
KeyFeatures
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Type A |
Type B |
Type C |
FormFactor
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20.0 x 28 x2.8mm
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29.6 x 38.5 x3.8mm
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54.40 x 74.10 x6.0mm
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Interface
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PCIe Gen.3 x1
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PCIe Gen.3 x2
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PCIe Gen.3 x4
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Protocol
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NVMe 1.3 |
NVMe 1.3 |
NVMe 1.3 |
TheoreticalPerformance
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8Gbps (1GB/s) |
16Gbps (2GB/s) |
32Gbps (4GB/s) |
Format ReleaseDate
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Feb.28 2019(Ver.2.0)
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Apr. 2017(Ver.1.0)
Feb. 28, 2019(Ver.2.0)
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Feb., 2019(Ver.2.0)
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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
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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)
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CFexpress Type A cards support speeds up to 1000MB/s. Compliant CFexpress Type A cards will use this logo.
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CFexpress Type B cards support speeds up to 2000MB/s. Compliant CFexpress Type B cards will use this logo
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CFexpress Type C cards support speeds up to 4000MB/s. Compliant CFexpress Type C cards will use this logo
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