Update 07.04.2026

Added optional bracket for 3-slot GPUs(print profiles). 

Description

This project was created with the idea of building PC in a compact form but using standard ATX hardware. It is dedicated to All in One water cooling systems and supports popular formats such as 360 / 420mm. Triangulus ATX Tower is an impressive open-air case that surprises with its form and functionality. It accommodates standard computer components while taking up significantly less desk space than a typical computer case.

The Triangulus ATX Tower is inspired by my previous design, the Triangulus ITX Tower, but has been completely redesigned to meet new requirements. It offers functionality not found in the previous model, allowing you to build a computer with standard ATX hardware. To enjoy this design, you don't need expensive ITX/SFX components.

Hardware Compatibility

* With SFX to ATX adapter: Link

** tested with MSI RTX 3070 Ventus x3 ~1Kg, to mount 3-slot GPU use optional x3 GPU Bracket

Printing

For maximum durability, print with ABS in a closed chamber. 

Basic parameters

• nozzle 0.4
• layer height 0.2
• wall count 3
• top layers 5
• infil 15% 

GPU Beam, GPU Bracket and PCI-E Riser Bracket print with 4 wall count for better stability.

To avoid warping on large parts, clean the work surface with dish soap. Using an adhesive glue is a good idea.

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 or dawnloads.

Cooler Bracket 140_1, Cooler Bracket 140_2

Allows to mount 420 / 280 / 140 AIO Cooler.

Button Bracket 12

Allows to mount 12mm button instead of 19mm.

x3 GPU Bracket with Support

Allows to mount 3-slot GPU. Mounts instead of standard GPU Bracket.

Cooler Bracket 120 not_centered

For AIOs with very short hoses.

Cooler Bracket 120 fan

For mounting fans instead of an AIO cooler.

Assembly

Below in the Triangulus_ATX_Tower_Asswmbly_Manual.pdf file you will find a detailed description of the assembly.

PCI-E Riser

Unfortunately, not every riser has identical mounting points. If you have problem to mount different riser, send me private message. I'll try to resolve the compatibility issue.