Released to mass market in late 2020 and fully documented by mid-2021, the Realtek RTL9210B is a highly integrated bridge controller that converts USB 3.1 Gen 2 (10 Gbps) to PCI Express (PCIe) Gen 3 x2, specifically designed for NVMe solid-state drives. By 2021, it had become the industry’s leading alternative to the ASMedia ASM2362, prized for its low power consumption, integrated voltage regulators, and support for advanced features like UASP, TRIM, and S.M.A.R.T. passthrough.
You may see references to the RTL9210 vs RTL9210B. rtl9210b datasheet 2021
Efficiency Features: Native support for TRIM commands ensures long-term SSD health by allowing proper garbage collection over USB. Performance and Compatibility RTL9210B-CG - Realtek Deep Dive into the Realtek RTL9210B (2021 Datasheet):
Always cross-reference with the 2022 addendum if you need USB 3.2 Gen 2x2 support (20 Gbps)—the 2021 RTL9210B does not support that mode. Hardware Differences vs