M.2 M Key to PCIex4 Expansion Board (Compatible with LattePanda Sigma)

The M.2 M Key to PCIe x4 Expansion Board expands a single M.2 slot into four PCIe interfaces, designed specifically for the LattePanda Sigma. It offers a plug-and-play solution for developers, makers, and hobbyists needing to connect external graphics cards and peripheral expansion cards.

Four-channel PCIe breakout

This board expands a single M.2 M Key slot into four PCIe x1 channels to resolve interface shortages on compact host boards. It enables the LattePanda Sigma to interface with multi-channel graphics cards and diverse PCIe add-on modules.

Optimised signal and thermal design

A four-layer circuit board design ensures strong anti-interference performance, precise impedance matching, and high-speed signal integrity. An integrated aluminium alloy heatsink manages heat dissipation to maintain continuous operational stability.

PCIe signal wiring and compatibility

The four onboard physical ports transmit dedicated PCIe signals rather than USB data. Connecting standard external PCIe cards requires the use of a PCIe x1 to PCIe x16 adapter card for each channel.

System compatibility and compact form

The unit operates without additional drivers across Windows, Linux, and macOS environments. Built to a standard 22x80mm footprint, it is rated for operating temperatures between 0°C and 55°C.

Downloads & documentation

• Product wiki (DFRobot)