Rtl9210b Datasheet 2021 [better] Link

: Combines a USB device controller with both a PCIe Gen3 x2 controller and a SATA controller. Auto-Switching

The is a high-performance USB 3.2 Gen 2 to PCIe Gen 3 x2/PCIe Gen 2 x1 Bridge Controller. It is widely used in NVMe SSD enclosures (M.2 to USB adapters) due to its low power consumption and thermal management. rtl9210b datasheet 2021

Realtek also provided a (RTL9210B-CG EVB) which included a USB-C receptacle, NVMe M.2 M-key slot, SPI flash socket, and two LEDs. : Combines a USB device controller with both

If you are flashing a drive, these are the critical settings to look for: Realtek also provided a (RTL9210B-CG EVB) which included

The first test was a disaster. She connected a 4TB Samsung 980 Pro NVMe. The drive got hot, the chip got hotter, and after 30 seconds, the USB link dropped. She went back to the datasheet. Page 12: "Thermal pad layout revision for 2021—recommended 2.5W/mK gap pad." She had used cheap thermal tape. She rebuilt the enclosure with proper copper shims.