Bus Interface Speed Standards for Large Size Data Transfer - SD Association
Archived: 2026-04-23 17:13
Bus Interface Speed Standards for Large Size Data Transfer - SD Association
Bus Interface Speed Standards for Large Size Data Transfer
Consumers
About SD Memory Card Choices
SD, SDHC, SDXC and SDUC Card Capacity Choices
Bus Interface Speed Standards for Large Size Data Transfer
Speed Class Standards for Video Recording
Application Performance Class for Running Smartphone Apps
Low Voltage Signaling
Copyright Protection for Digital Data (CPRM)
SD Express / UHS-II Verification Program (SVP) Verified Product
#choosemicroSD
Usage Tip Videos
FAQ
Consumers
Consumers
About SD Memory Card Choices
SD, SDHC, SDXC and SDUC Card Capacity Choices
Bus Interface Speed Standards for Large Size Data Transfer
Speed Class Standards for Video Recording
Application Performance Class for Running Smartphone Apps
Low Voltage Signaling
Copyright Protection for Digital Data (CPRM)
SD Express / UHS-II Verification Program (SVP) Verified Product
#choosemicroSD
Usage Tip Videos
FAQ
SD Bus Interface Specification has been continuously increased over the years from High Speed (25MB/s) to 3rd Generation of Ultra High Speed UHS-III (624MB/s). Now the SDA offers SD Express which use the PCIe Gen.4 Interface with NVMe Protocol to deliver (3940MB/s) data transfer rates between SD host devices and memory cards.
See “SD Express – Revolutionary Innovation for SD Memory Cards” in Youku.
See video for application advantages
Any high speed cards can be used in UHS-I, UHS-II or SD Express host devices.
In order to utilize the performance supported by a host device it would be desirable to use cards that supports the highest speed interface supported by the host. Therefore, devices supporting UHS-I perform the best with cards that support at least UHS-I.
UHS-II host devices perform the best with cards that support at least UHS-II and SD Express host devices will perform best when using SD Express cards.
Bus Interface Speed Standards for Large Size Data Transfer
Consumers
About SD Memory Card Choices
SD, SDHC, SDXC and SDUC Card Capacity Choices
Bus Interface Speed Standards for Large Size Data Transfer
Speed Class Standards for Video Recording
Application Performance Class for Running Smartphone Apps
Low Voltage Signaling
Copyright Protection for Digital Data (CPRM)
SD Express / UHS-II Verification Program (SVP) Verified Product
#choosemicroSD
Usage Tip Videos
FAQ
Consumers
Consumers
About SD Memory Card Choices
SD, SDHC, SDXC and SDUC Card Capacity Choices
Bus Interface Speed Standards for Large Size Data Transfer
Speed Class Standards for Video Recording
Application Performance Class for Running Smartphone Apps
Low Voltage Signaling
Copyright Protection for Digital Data (CPRM)
SD Express / UHS-II Verification Program (SVP) Verified Product
#choosemicroSD
Usage Tip Videos
FAQ
SD Bus Interface Specification has been continuously increased over the years from High Speed (25MB/s) to 3rd Generation of Ultra High Speed UHS-III (624MB/s). Now the SDA offers SD Express which use the PCIe Gen.4 Interface with NVMe Protocol to deliver (3940MB/s) data transfer rates between SD host devices and memory cards.
See “SD Express – Revolutionary Innovation for SD Memory Cards” in Youku.
See video for application advantages
Any high speed cards can be used in UHS-I, UHS-II or SD Express host devices.
In order to utilize the performance supported by a host device it would be desirable to use cards that supports the highest speed interface supported by the host. Therefore, devices supporting UHS-I perform the best with cards that support at least UHS-I.
UHS-II host devices perform the best with cards that support at least UHS-II and SD Express host devices will perform best when using SD Express cards.