> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# 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.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=FIT0971:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/FIT0971:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## 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)