Ender 3 PSU Fan Upgrade to Boxed AMD CPU Fan

thingiverse

I'm repurposing an old 80 mm fan cover to work with my AMD CPU fan that was collecting dust. It fits perfectly flush when I use the spacers to blow air inwards, but it can also be reversed to pull air out of the power supply unit, eliminating the need for those spacers altogether. The spacers are designed specifically for the original screws that came bundled with the fan. To ensure a snug fit, simply take some sandpaper and gently rub it along the inside where the fan sits - just three or four gentle revolutions should do the trick without any wobble.