What is a CFexpress Card?
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 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 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 Type A cards support speeds up to 1000MB/s. Compliant CFexpress Type A cards will use this logo. |
|
 |
CFexpress Type B cards support speeds up to 2000MB/s. Compliant CFexpress Type B cards will use this logo |
|
 |
CFexpress Type C cards support speeds up to 4000MB/s. Compliant CFexpress Type C cards will use this logo |
|
Laisser un commentaire