Open Frame PC Case ATX

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Update

24.04.2026 - Updated Print profile for “non AIO” version. Added top AIO brackets STL files (for non AIO version). The brackets are designed for 240 and 280 mm radiators.

19.01.2026 - Added support for vertical gpu mount.

 

Description

This project was created to be easy to print and use. Can be printed with ABS on advanced devices but also by A1 mini printer with PETG. Is compatible with popular motherboard standards ATX, mATX, ITX and also with different sizes All-In-One water coolers from 120mm through 280mm to 360mm. It will work well as daily open air PC case and also as display stand for retro PC.

 

Advantages

• Classic, accessible component layout
• Support for popular motherboard and AIO cooler standards
• 3D printable structure without using additional profiles
• Minimalist industrial design
• Easy to print and assembly

 

Hardware Compatibility

* With SFX to ATX adapter: Link

** Using Feet adapters(print profiles)

*** with optional brackets 1x 3.5” and 1x 2.5” drives under 120mm AIO cooler or 2x 3.5”
and 1x 2.5” drives insted of AIO Cooler(print profiles)

Example configurations

Printing

• nozzle 0.4
• layer height 0.2
• wall count 3
• top layers 5
• infil 20%

• filament ABS/ASA or PETG

 

3D Printed Parts Overview
Core

 

3D Printed Parts Overview
Additional parts

3D Printed Parts description 

 

Optional parts

Optional parts can be found in print profiles.

 

Feet Adapters

Optional adapters needed for mount 360mm AIO cooler.

 

GPU Support

Optional adjustable GPU support. Useful for card without backplate. 

 

3.5" & 2.5" Drive Bracket

Optional Bracket allows to mount additional drives below 120mm AIO cooler or mounted in two pieces instead of AIO cooler.

 

 

Optional parts for vertical GPU mount

 

Assembly

Detailed assembly instructions can be found in the Open_Frame_PC_Case.pdf file.

 

 

Hardware Assembly

AIO Cooler

In place marked blue dots can be mounted AIO cooler 120 / 240 / 360(with feet adapter). Orange dots shows place for AIO cooler 140 / 280. 

 

 

Mainboard

Frame allows to mount several motherboard standards: ATX, mATX, mITX.

 

• For ATX motherboards Core MB Beam should be mounted in lowest position and remove mATX Adapter.

 

• For mount mATX place Core MB Beam in high or mid position it depends of motherboard specification. mATX Adapter is needed.

 

• mITX mother board don't need mATX Adapter. Core MB Beam mount in lowest position for Frame stability. 

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