20L mATX Desktop PC Case

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Bounding box: 260.0 × 260.0 × 296.0 mm
Engine: Precision B-rep
Parameters: 26
Published: November 2, 2026

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The prompt

i want to build a desktop PC. the size is 20L. it can support mATX motherboard. It use PS2 power supplier. it has a 70mm*70mm*25mm rear axial system fan. CPU is up to 65W. Please help to generate the CAD

Parameters

Name	Value	Range
Case Width	260 mm	200 – 400
Case Height	296 mm	250 – 500
Case Depth	260 mm	220 – 400
Panel Thickness	1.2 mm	0.5 – 3
Motherboard Depth	244 mm	170 – 244
Motherboard Height	244 mm	170 – 244
Motherboard Bottom Clearance	20 mm	5 – 50
Standoff Height	6 mm	3 – 12
Standoff Diameter	6 mm	3 – 10
Standoff Inset	8 mm	2 – 20
Rear Fan Size	70 mm	40 – 120
Fan Hole Diameter	65 mm	30 – 110
Fan Screw Spacing	61.5 mm	30 – 105
Fan Screw Hole Diameter	4.3 mm	2 – 6
Fan Center X	130 mm	20 – 240
Fan Center Z	180 mm	50 – 280
PSU Width	150 mm	100 – 200
PSU Height	86 mm	50 – 120
PSU Length	140 mm	100 – 200
I/O Cutout Width	160 mm	100 – 200
I/O Cutout Height	45 mm	30 – 70
I/O Cutout Z	250 mm	50 – 280
Front Vent Hole Diameter	4 mm	2 – 10
Front Vent Columns	5 count	1 – 20
Front Vent Rows	10 count	1 – 30
Front Vent Spacing	12 mm	5 – 30

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.

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