3U 10" Rack Case - Mini-ITX + SFX PSU + GPU

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A proper SFX-powered Mini-ITX rack case — finally!

I run a 10" rack homelab and wanted to run local AI workloads in the rack — that meant fitting a real GPU alongside an SFX PSU and a Mini-ITX motherboard in the same enclosure. So I designed this enclosure that mounts the GPU directly into the PCIe slot, combining everything into a single 3U unit.

Compatibility

• 10" rack
• Side panels and SSD-bay is compatible with “NAS” variation!

What fits in this enclosure

• Mini-itx motherboard
• SFX Power Supply
• GPU (Thickness up to 42-43mm)
• 2x 60x60x25mm fans
• 1x 92x92x15mm fan

• Max CPU cooler height: ~80mm (measured from motherboard PCB to top panel interior — not confirmed, verify your cooler fits before building)

   

  

  

  Models used in renders: Mini-ITX motherboard, SFX Power Supply, GPU — sourced from GrabCAD.

Structural Integrity

Total weight of the enclosure with all hardware installed is around 3.5kg, so structural integrity has been a real concern and top priority since day one. Unlike the storage version, this enclosure doesn't have an HDD tray to help distribute load — instead the main stress point is the GPU, which is supported directly by the PCIe slot without a riser cable. The front panel uses 4mm thickness, 25% infill, and 6 walls, fixed with 3 screws on the left side and 5 on the right due to space constraints.

I also did some stress testing by shaking the case from the rack ears and it feels solid. The one thing I haven't tested is long-term behavior — I can't guarantee how it holds up under stress over months or years, but deformation shouldn't be an issue under normal use. The enclosure is printed in PETG, and if you want even more rigidity you can use ASA or ASA-CF.

Thermals

Tested with an AMD Ryzen 5 5600G (Thermalright X47 cooler) and an RTX 5060 Ti 16GB under full load (GPU burn-in and s-tui stress testing). CPU stabilized around 80°C and GPU around 70°C — both within acceptable range for an enclosed rack build.

Hardware requirements

• Heatset inserts M3
  OD - 5mm / L - 4-5mm
  Aliexpress

   

• 

  M3 x 6mm
  Aliexpress
   

• Motherboard standoff

  

  M3 - Length 6mm
  Aliexpress
   

• Motherboard screw M3

  

  Aliexpress

   

• 6-32x6mm (GPU bracket screws)

  

  Aliexpress

   

• Power Button - 12mm

  

• Aliexpress

   

Print settings

Some panels use Grid or Honeycomb infill with 0 top/bottom layers to allow airflow through the walls and to speed up printing compared to modelled honeycomb or grid patterns. Settings are included in the .3mf file, but if issues occur or you are using an incompatible slicer, see the instructions below.

These instructions apply specifically to BambuStudio/OrcaSlicer but same idea works with all slicers I believe and I will provide .step files so model data for slicing stays intact.

Object specific settings can be found in “Objects” view.

Under objects menu choose objects/object which you want to change settings with.

Set global settings first and after that set per object settings otherwise global settings are gonna override some per object settings. 

Global settings for all parts

• Infill gyroid 25%
• Wall loops 6 - Top shell layers 6 - Bottom shell layers 4
• Material: PETG
• Nozzle size: 0.4mm
• Layer height: 0.2mm

Front panel/rear panel/fan grill mesh settings

• Infill grid 50%
• Wall loops 0 - Top shell layers 0 - Bottom shell layers 0

Honeycomb settings for left and right side panel.

• Infill honeycomb 20%
• Wall loops 1 - Top shell layers 0 - Bottom shell layers 0

Front panel should look like that after slicing.

Right and left side panels should have this type of honeycomb ventilation after slicing. In case you want to experiment with sidepanel patterns, feel free to choose different infill or even tinker with .step models.

⚠️ Notes ⚠️

• Some images have been AI-enhanced, but all photos show the real printed model.
• This model is designed around KWS rack dimensions. It should also fit LabRax racks by dimension, but note it extends ~7mm past the rear.
• Panels with grid/honeycomb patterns cannot be printed via Bambu Handy — per-object infill settings are not supported in the app.

Changelog

07/16/2026

• Added Heatset inserts, M3 screws and “filament” under BOM, so optionally they can be obtained from bambulab as well.