DIY Micro PCIe SlimSAS 8654 eGPU testbench

Overview

This is a custom, compact 3D-printable testbench designed specifically for the Micro PCIe SlimSAS 8654 eGPU setup. It provides a secure, organized, and open-air frame to mount your external graphics card, SlimSAS adapter board, and power supply unit (PSU). Perfect for hardware enthusiasts, small form factor (SFF) tinkerers, and anyone looking to unlock full PCIe x8 speeds on mini PCs like the Lenovo Tiny series without cluttering their desk.

The design focuses on structural rigidity, optimal airflow, and minimal footprint while ensuring your hardware remains safely positioned during intense benchmarking and gaming sessions.

How to Print

To ensure the enclosure can handle the heat and weight of a desktop graphics card and power supply, please follow these print recommendations:

• Material: ABS or ASA is highly recommended for its excellent temperature resistance and structural strength. PETG can be used as an alternative, but PLA is not recommended due to potential warping from GPU/PSU exhaust heat.

• Infill: 30% to 40% (Grid, Gyroid, or Honeycomb pattern for maximum structural stability).

• Walls/Perimeters: 3 to 4 wall lines for strong screw hole retention.

• Supports: No supports needed—the model is optimized to print clean natively.

• Adhesion: No brim needed (unless your printer struggles with ABS/ASA warping on the build plate).

Requirements & Hardware

To assemble this eGPU testbench, you will need the following hardware components:

Fasteners & Inserts:

• 6 x M3 x 5mm (OD) x 5mm (Length) Female Thread Brass Knurled Insert Nuts (for melting into the plastic mount points)

• 6 x M3 x 8mm Screws / Bolts (to secure the adapter board and GPU bracket)

PC Parts:

• Graphics Card: Any GPU

• Power Supply Unit: SFX Form Factor PSU (e.g., Corsair SF750) https://amzn.to/4wagIiz

• Adapter: PCIe x16 to 2x External Micro PCIe SlimSAS 8654 ports Adapter Board https://amzn.to/4v7i2lB

• Adapter: 2x Micro PCIe SlimSAS 8654 ports Adapter to PCIe x16 to Board https://amzn.to/3R8ezoM

• Cable: High-quality SlimSAS 8654 cable https://amzn.to/4eBjd7T

• Power Delivery: 24-pin ATX PSU jump starter/bridge plug (to short the PS-ON and Ground pins so the PSU runs externally)

Mini PC with PCIe slot:

• 2.3L Dell Precision 3260 https://amzn.to/4f267As

• 1L Lenovo ThinkStation P3 Tiny https://amzn.to/4oHV82s

• 3.4L HP Z2 G1i Mini https://amzn.to/4eHdb4e

• 1.8L MINISFORUM MS-01 Mini PC https://amzn.to/4aO5wjs

• 1.8L MINISFORUM MS-A2 Mini Workstation https://amzn.to/3SpXreI

Compatible GPU model:

• Asus Dual Radeon RX 9060 XT 8GB/16GB https://amzn.to/4oPqPa7

• PowerColor Reaper RX 9060 XT 8GB/16GB https://amzn.to/4oQXR9Z

• 3D case printed by Bambu Lab H2S https://amzn.to/3QEjMoc

• 3D case printed material: ABS https://amzn.to/3SsUWbt

PC parts: Amazon:

• SlimSAS SFF8654 Adapter https://amzn.to/4akzeMS

AliExpress:

• SlimSAS SFF8654 Adapter https://s.click.aliexpress.com/e/_c3JZi2pP

Disclosure: As an Amazon and AliExpress Associate, I earn a small commission from qualifying purchases made through the affiliate links below at no extra cost to you.

Disclaimer

This file is provided "as is" without any warranties or guarantees of any kind. The designer offers no official tech support, troubleshooting, or direct message replies regarding print failures or assembly issues. Users are fully responsible for properly slicing, preparing, and printing the model according to their specific 3D printer settings, material behaviors, and safety standards.

Terms of Use

• Personal Use Only: Licensed solely for individual use. The buyer is always welcome to modify the digital model for personal requirements as needed.

• Distribution Ban: The buyer agrees not to distribute or sell the files, modified versions, or physical printed instances on eBay, Etsy, Amazon, AliExpress, or any online web stores. Uploading these assets to any 3D model sharing platforms or online hosting services is strictly prohibited.

• Content Creation Guidelines: If you feature this setup in video projects or digital content, the layout must be maintained in its original form without passing off variations as an original setup. You agree to include clear credit attribution in the description box: "Design by ITG Gear, YouTube: https://www.youtube.com/@itggear"