Lenovo 4X90Q84427 network card Ethernet

The Lenovo 4X90Q84427 (ThinkPad Ethernet Extension Adapter Gen2) is a compact wired Ethernet adapter designed for selected ThinkPad systems. It provides a direct Ethernet interface through an Ethernet extension Gen 2 connection, enabling stable wired network access with PXE and remote control support. The adapter is driver-free and ready to use, with a black finish and an 80 mm cable for easy placement and portability.

Advantages

The adapter offers plug-and-play operation without the need to install drivers, a small form factor that fits close to the host device, and support for PXE boot and remote management functions. Its wired connection delivers consistent network performance and reduced latency compared with wireless alternatives.

Suitable for

• Booting or installing operating systems via PXE
• Remote administration and out-of-band management
• Systems requiring a stable wired network connection
• ThinkPad models compatible with Ethernet Extension Gen2

Key specifications

• Model: Lenovo 4X90Q84427 (ThinkPad Ethernet Extension Adapter Gen2)
• Connectivity technology: Wired Ethernet
• Interface / Host interface: Ethernet extension Gen 2
• Cable length: 80 mm
• Colour: Black
• Weight: 0.032 kg

How to use

Connect the adapter to the compatible ThinkPad Ethernet extension port, then attach a standard Ethernet cable to the adapter’s RJ45 port. The device is driver-free; the host system should recognize the adapter automatically. Use system BIOS/UEFI settings to enable PXE boot or configure remote management features if required.

Recommendations

Use the adapter with supported ThinkPad systems and verify compatibility with the device’s Ethernet extension Gen2 port. Avoid excessive bending of the 80 mm cable and ensure firm connections to maintain reliable network performance.