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

**Type:** Product page · **SKU:** FIT0971 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/m2-m-key-to-pciex4-expansion-board-compatible-with-lattepanda-sigma.html ([markdown](https://core-electronics.com.au/m2-m-key-to-pciex4-expansion-board-compatible-with-lattepanda-sigma.html.md))

The M.2 M Key to 4-way PCIe graphics card expansion card board is designed for LattePanda Sigma. Features 4 PCI-E interfaces and high-speed transmission...

## Pricing

- **Price:** $33.55 (inc GST) — $30.50 AUD, exc GST
- **Quantity discounts:** 6+ $28.97 (exc GST) · 12+ $27.75 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 19 and Aug 24.

## Description

This is an M.2 M Key to 4-way PCIe expansion board specially prepared for [LattePanda Sigma](https://core-electronics.com.au/lattepanda-sigma-x86-windows-linux-single-board-computer-server-32gb-ram.html) users. It effectively solves the problem of insufficient PCIe interfaces. It is driver-free and plug-and-play.It can be used with the Sigma motherboard to expand 4 channels of PCIe interfaces to connect external multi-channel graphics cards or other PCIe devices.

The expansion card uses a 4-layer circuit board, which has strong anti-interference ability and effectively ensures the stability of PCIe high-speed signal transmission, data integrity, and impedance matching. In order to enhance operational stability, the chip is also equipped with an aluminum alloy heat sink to provide better heat dissipation.

![Board Overview of M.2 M Key to PCIex4 Expansion Board](https://core-electronics.com.au/attachments/localcontent/4_112901f2b92.jpg)

**Note:** All 4 ports are PCIex1, transmitting PCIe signals, not USB data! It must be used with a [PCIex1 to PCIex16 adapter card](https://www.dfrobot.com/product-2813.html) to connect an external PCIe device.

### Features

- 4 PCIe interfaces
- With heat sink, performance is more stable
- Compatible with multiple systems
 
### Specification

- Number of extensions: PCIex1-4
- Working temperature: 0°C~55°C
- Storage temperature: -20°C~65°C
- Compatible systems: Windows/Linux/Mac os
- Size: 22\*80mm
 
### Documents

- [Product wiki](https://wiki.dfrobot.com/M2_M_Key_to_PCIEx4_Expansion_Card_SKU_FIT0971)
 
### Parts List

- M.2 M Key to PCIex4 Expansion Board x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/F/I/FIT0971-1.jpg)