Realtek RTL9210B-CG is a specialized USB bridge controller that enables "dual-protocol" support, allowing a single M.2 enclosure to host both NVMe (PCIe)
This article compiles and explains the key sections from the official 2021 documentation, which was released to address issues found in earlier 2019-2020 silicon (e.g., overheating and UASP negotiation failures). rtl9210b datasheet 2021
M.2 SSDs in a single device. This "dual-protocol" capability makes it a versatile choice for external drive enclosures. Key Specifications from the 2021 Datasheet Interface Bridge : USB 3.2 Gen 2 to PCIe Gen3 x2 or SATA Gen3. (SuperSpeed Plus). PCIe (NVMe) bandwidth via 2 lanes (PCIe Gen3 x2). bandwidth. Automatic Switching : Features a Realtek RTL9210B-CG is a specialized USB bridge controller
PCI Express Interface: Compatible with PCIe Gen3 x2, providing a maximum link speed of 8GT/s. Supply voltages: core and I/O rails listed separately (e
Realtek RTL9210B-CG is a dual-protocol USB bridge that acts as a "host" for both PCIe/NVMe and SATA drives, allowing for automatic switching between the two. Key Technical Specifications Host Interface : USB 3.1 Gen 2 (up to 10Gbps). Device Interfaces : PCIe Gen3 x2 (up to 16Gbps bandwidth). : SATA Gen3 (up to 6Gbps). Auto-Switching