It’s all wrapped up in a neat slant-sided 3D-printed case that fits onto the ATX power supply itself. The result is a neat and tidy power supply built out of readily-available components.

SFX power supplies are built specifically for small-form-factor PC cases, and they come with a much higher power density.

The PC power supply has ... as in many cases a TL431 adjustable voltage reference. You may also find the various heatsinks to be useful in other projects. As you can see, an ATX PSU can yield ...