This is one of the most successful and mass-produced Fast Ethernet controllers in computing history. It tops out at a maximum speed of 100 Mbps . It is physically impossible for a true RTL8139 chip to achieve Gigabit (1000 Mbps) speeds.
Comprehensive Guide to Realtek RTL8139 and 810X Family Drivers on Windows 10
If your device is listed as "PCI-E Gigabit," you need the 810x Family driver , not the actual RTL8139 driver. The keyword is a historical artifact.
Basic drivers are often included "inbox" with Windows, meaning the OS might recognize and install them automatically without an external download.
You can buy a modern, natively supported PCI-Express Gigabit Ethernet Card (1000 Mbps) or a USB 3.0 to Gigabit Ethernet Adapter online for less than $15. These modern upgrades feature true Realtek RTL8111 or Intel chipsets, which Windows 10 and Windows 11 recognize instantly without downloading a single file. realtek rtl8139 driver 810x family pci-e gigabit windows 10
These are newer than the 8139, often found on budget laptops and desktops, supporting 10/100 Mbps over PCIe.
: Essential for wired LAN connections, internet access, and file sharing on older or budget-friendly desktop systems. Legacy OS Compatibility : While modern versions support Windows 10
The full error message often reads: "The Realtek Network Controller was not found. If Deep Sleep Mode is enabled Please Plug the Cable." This usually happens on older hardware with newer versions of Windows 10 where the power management is causing the NIC to turn off permanently to save energy.
If you are running into specific installation errors, let me know: What is the exact or Device Status error code ? Are you using a 32-bit or 64-bit version of Windows 10? AI responses may include mistakes. Learn more This is one of the most successful and
This is a legendary Fast Ethernet (10/100 Mbps) controller family utilizing the older PCI interface. It was the backbone of home and office networking throughout the late 1990s and 2000s.
This often happens on 64-bit systems because the legacy 32-bit architecture fails to translate. Ensure you have forced the driver using Method 3 above, specifically choosing a 64-bit signed driver from the final Windows 7 catalog. Issue 2: Random Disconnections under Heavy Load
// Define the driver's INF file #define DRIVER_INF "rtl8139.inf"
Windows 10 features a massive built-in database of legacy drivers designed to make older hardware work instantly upon installation. Comprehensive Guide to Realtek RTL8139 and 810X Family
Windows 10 often includes for the RTL8139 series, meaning the card may work as soon as it is plugged in without any manual downloads. If your device is not recognized, follow these steps: Realtek Rtl8139/810x Family Fast Ethernet NIC - GlobalSpec
Check the box at the bottom for . Click Apply and then OK .
Right-click your Realtek card (often listed as "Realtek RTL8139/810x Family...") and choose . Select Browse my computer for drivers .
Is your Windows 10 operating system running the version?
: Sites like Driver Scape and Treexy host versions explicitly labeled as compatible with Windows 10 32-bit and 64-bit. Installation Tips RTL8139 - OSDev Wiki
If you truly have an old RTL8139 card (PCI, not PCI-E) and you need Windows 10: