HP ProDesk / EliteDesk G4 Mini 2.5GbE Adapter

This is a 3D-printable mounting adapter for installing an M.2 A+E-key 2.5GbE NIC in the rear Flex IO opening of compatible HP Mini PCs.

The adapter securely holds the external RJ45 module in the Flex IO opening while the NIC replaces the factory Wi-Fi card in the M.2 A+E-key slot.

Features

• Adds a 2.5GbE RJ45 port
• Uses the existing rear Flex IO opening
• Bolts securely to the computer chassis
• Requires no permanent modification to the computer
• Uses standard M2 hardware

Compatibility

Tested with:

• HP ProDesk 600 G4 Mini
• HP EliteDesk 800 G4 Mini

Other HP Mini systems with a similar Flex IO opening and internal layout may also fit, but have not been tested.

Required Parts

• Printed adapter
• M.2 A+E-key Intel I226-V 2.5GbE NIC
• Two CNC Kitchen M2 heat-set inserts
• M2 screws for assembly and chassis mounting

NIC used:

https://www.amazon.com/dp/B0G4J54K18

The adapter uses standard M2 screws similar to those commonly used to secure M.2 SSDs and Wi-Fi cards.

Printing Instructions

Tested settings:

• Layer height: 0.15 mm
• Perimeters: 4
• Infill: Minimal; four perimeters eliminate most of the infill
• Orientation: Adapter face down
• Supports: Enable supports around the lip

A heat-resistant material such as PETG, ABS, or ASA is recommended because the adapter is installed inside the computer. PLA may work, but has not been tested for long-term heat exposure.

Check the sliced model carefully to confirm that the lip is properly supported. Avoid generating unnecessary supports inside the screw holes and heat-set insert holes.

Installation

1. Install the two M2 heat-set inserts in the printed adapter.

2. Remove the existing Flex IO cover and secure the printed adapter in the opening using M2 screws.

3. Remove the factory Wi-Fi card from the M.2 A+E-key slot.

4. Install the 2.5GbE NIC in the M.2 slot.

5. Connect the NIC cable to the RJ45 module mounted in the adapter.

6. Verify that the cable does not contact the fan or interfere with any other internal components before reassembling the computer.

Important Notes

• This adapter occupies the M.2 A+E-key slot normally used by the Wi-Fi card.

• Removing the Wi-Fi card may also remove Bluetooth functionality.

• Multiple board layouts are sold under similar descriptions for this NIC. The linked version appears to be the most common, but other layouts may not fit the adapter.

• Compare the NIC and RJ45 board layout with the project photos before purchasing.

Disclaimer

This is an unofficial community project and is not affiliated with or endorsed by HP, Intel or the NIC manufacturer.

Installation is performed at your own risk. Disconnect power before working inside the computer, and verify that printed parts and cables do not interfere with cooling, moving components, or electrical connections.