RTX5090 Support – Lian Li O11 Dynamic EVO XL

This is a GPU anti-sag support bracket designed for the Lian Li O11 Dynamic EVO XL, specifically made to support large and heavy GPUs like the RTX 5090.

The bracket mounts directly to the top 120 mm case fans and uses gravity to keep the graphics card perfectly level. Once installed, it provides a clean and minimal way to prevent GPU sag without placing any supports underneath the card.

The design attaches using standard self-tapping fan screws, the same screws normally used to mount case fans.

This bracket was designed and tested with my specific system configuration and fits perfectly in my setup.
However, depending on your GPU model, motherboard layout, or cooling setup, you may need to slightly adjust the model for your own system.

To make customization easy, I have included the .STEP file so you can modify the design in your preferred CAD software.

There are two versions:

• One with the ROG Logo
• One that is plain.

Material used: ASA-CF

Other strong materials like PETG, ABS, ASA, or Nylon may also work depending on your setup.

Because every PC build is slightly different, small adjustments may be required to perfectly fit your GPU and system layout.

For this reason, the STEP file is included so you can easily modify dimensions or clearances if needed.

Designed and tested with my personal system:

• Case: Lian Li O11 Dynamic EVO XL
• GPU: RTX 5090 Asus ASTRAL BTF
• Mounting: Top 120 mm fan screws