SD 8.0 Specification To Allow 4GB/s Transfer Rates By Leveraging PCIe 4.0
SD 8.0 cards will retain backwards compatibility and will run even faster thanks to PCIe 4.0 and NVMe 1.4. For hardware making use of PCIe 3.0 x2 or PCIe 4.0 x1, transfer rates are said to be up to ~2GB/s while using PCIe 4.0 x2 will allow up to 4GB/s. SD Express cards supporting dual PCIe lanes will now have three rows of pins.
More details on the SD 8.0 specification for faster memory cards moving forward can be found via today's press release at SDCard.org.