Use computer PSU for high-amperage LED RGBW

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i'm trying use old computer's atx psu power rgbw light strip. each color's brightness controlled mosfet connected arduino.

even though 12v single rail on psu rated @ ~500w , strip shouldn't draw more 180w, i'm apparently going on max when directly connect 4 colors. psu shuts down , need power off/on power back.

i haven't connected arduino yet because sneaking suspicion i'm @ risk of frying it. i'm doing wrong here.

i read on 1 site each pin on 24 pin molex connector has max amperage of ~6a. possible connect multiple pins in parallel share current between them , increase max amperage? , putting arduino @ risk if connect 12v pin when i'm drawing power?

thanks much.

computer psus have current rating each separate voltage, have avoid
exceeding of them individually.


Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Use computer PSU for high-amperage LED RGBW


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