XQD is a media card format that was designed to be a successor to the CompactFlash card. XQD has been adopted by Nikon and was first incorporated into the D4 and D4S and subsequently into the D5, D500 and D850 DSLRs and Z 7 and Z 6 full-frame mirrorless cameras. XQD cards are based on the PCI Express® Gen 1 interface (PCIe) and support bus speeds up to 250MB/s and provides a solid base for future performance enhancements. XQD cards have begun to be deployed within the professional imaging and video markets. XQD cards have the following dimensions Length 38.5...
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...