Since the SR9900 is a USB 2.0 device, its theoretical maximum speed is 480 Mbps. However, the chip itself is designed for 10/100M Ethernet. Real-world tests for this chip show average speeds around 94.7 Mbps , which is standard for a Fast Ethernet (100M) connection.
This is the most reliable method for a manual installation.
Up to 480 Mbps (limited by the USB 2.0 bus architecture) Ethernet Speed: 10/100 Mbps Fast Ethernet (not Gigabit) Chipset Manufacturer: Corechip Semiconductor, Inc.
Because the SR9900 is an ultra-low-cost chip, Corechip does not maintain a highly visible, consumer-facing website for direct downloads. Most users get stuck when Windows fails to pull the driver automatically via Windows Update. usb vid-0fe6 amp-pid-9900
Every USB peripheral uses a specific identification pairing to tell the host operating system what it is and who manufactured it:
The USB device identified by usb vid-0fe6 amp-pid-9900 is a widespread, budget-friendly USB to Ethernet adapter based on the . Its compatibility is excellent with Windows (using official drivers) and Linux (using the native cdc_ether driver), making it a go-to choice for adding network connectivity to devices like the Raspberry Pi.
This specific product ID corresponds to the Corechip RD9700 USB 1.1 Ethernet Adapter (or SR9700/QF9700 clones). Since the SR9900 is a USB 2
These adapters are known for being budget-friendly but may experience higher CPU overhead than premium brands like Realtek or ASIX. They are ideal for steady 100 Mbps connections but are not suitable for Gigabit-speed environments. Linux usb.ids # Vendors, devices and interfaces. Please keep sorted. List of USB ID's by Stephen J. Gowdy - USBDev.ru
Modern operating systems handle common chipsets automatically, but the RD9700/SR9700 series frequently requires manual driver intervention on newer platforms. 1. Windows 10 and Windows 11 (Automatic Update) Plug the USB adapter into your computer. Open (Right-click Start > Device Manager).
The Corechip SR9900 relies on legacy architectures but maintains functional drivers across several platforms: Operating System Compatibility Status Installation Notes Fully Supported This is the most reliable method for a manual installation
Most devices with this specific ID (0fe6:9900) are usually the or a generic clone utilizing the Syntek STK1150 or Somagic SMI-2021 chipset.
Every USB device contains a unique set of hexadecimal codes embedded in its firmware by the manufacturer. Operating systems use these codes to look up and load the correct driver software.
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