PCI\VEN_10EC&DEV_8126
RTL8126 5GbE Controller driver
PCI\VEN_10EC&DEV_8126 is the Realtek Semiconductor Co., Ltd. RTL8126 5GbE Controller, an Ethernet device. Without it the wired port shows as an Ethernet Controller under Other devices and the cable does nothing. Get it from Windows Update or your PC maker first; the chip maker's own package is on realtek.com.
Device details
| Hardware ID | PCI\VEN_10EC&DEV_8126 |
|---|---|
| Device name | RTL8126 5GbE Controller |
| Maker | Realtek Semiconductor Co., Ltd. (PCI vendor ID 10EC) |
| Device type | Ethernet |
| Driver guide | Get the Realtek Ethernet driver |
| Latest official package | Realtek Ethernet (NDIS) auto installer 10.80.50, October 5, 2026 |
How to install the driver for RTL8126 5GbE Controller
- Confirm the ID. In Device Manager, right-click the device, open Properties, then Details, and pick Hardware Ids. The first line should start with
PCI\VEN_10EC&DEV_8126. - Try Windows Update. Settings, Windows Update, Advanced options, Optional updates. Network drivers may appear here once another connection works, such as Wi-Fi or a phone hotspot.
- Check your PC maker. Enter your model or serial number on its support site and look under Networking or LAN.
- Use the chip maker's package. Realtek Ethernet (NDIS) auto installer on realtek.com. Our get the realtek ethernet driver guide explains which package fits.
- Restart and check. Plug in the cable and check that Windows shows a wired connection.
Other Realtek ethernet IDs
VEN_10EC&DEV_0139RTL-8139/8139C/8139C+ Ethernet ControllerVEN_10EC&DEV_8125RTL8125 2.5GbE ControllerVEN_10EC&DEV_8127RTL8127 10GbE ControllerVEN_10EC&DEV_8136RTL810xE PCI Express Fast Ethernet controllerVEN_10EC&DEV_8137RTL8104E PCIe Fast Ethernet ControllerVEN_10EC&DEV_8138RT8139 (B/C) Cardbus Fast Ethernet Adapter
Device names: The PCI ID Repository, public data. We never host driver files: downloads come from the maker.