Asus DSL-N66U "Air cooler block"

Slicer: S3D
Filament: PLA

When infill pattern being rectilinear, you can use 15-20% infill with 2 layers for top/bottom/walls.

Support is for the blower inlet so make sure you have selected support type option "from build platform only".
If you want nicer text quality you can additionally use another process with same layer height but only changing extrusion width to 0.3mm.

Inlet height ~17mm and width ~13mm