I realize that this is not exactly a computer issue but here GOES. I'm using an OLD computer power supply to power quiet 12 V cooling fans for electronic equipment in an entertainment unit. I am running 3 120 mm fans that draw 1.4 W max. with a 200 W power supply. I have 2 old PS's, the oldest has a switch that will turn it on and off but has a noisy cooling fan. The newer PS has a quieter fan but won't turn on (I'm guessing) without a signal from the motherboard; it worked OK before I removed it from a computer. My question is two part; can I disconnect the cooling fan in the older PS since I'll be using less than 5 W of power total without overheating the PS? Alternatively is there a way to "jump" the newer power supply so that it will turn on without the motherboard connection? ThanksTo jump a power supply you take a paper clip. bend it into a U shape and touch one end to a green wire of the power supply and the other to any black wire. this should turn it on.Quote

can I disconnect the cooling fan in the older PS since I'll be using less than 5 W of power total without overheating the PS?