Prusa i3 MK3 PSU cooler
thingiverse
The Prusa i3 Mk3 power supply gets a boost from two 40 mm, 12 volt fans wired in series to keep it running cooler. A convenient fan holder and cover plate attach easily to the PSU's slots, making installation a breeze. These low-draw fans suck up just 0.04 amps, posing no additional strain on the power supply.
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