I've got a 60mm fan, Nidec Beta SLon the label it says 24 V DC - 0.08 Amp Now am I right in saying that the yellow wire on a standard molex is 7 volts and the red wire is 12 volts? I have tried connecting this fan up to the red first and then the yellow but it spins way too slowly for any decent airflow, again I am guessing that it's because it needs 24 volts? What would happen if I connected both the yellow and red wires (thus feeding 19 volts?) to the positive pin on the fan, would it blow my PSU?
no no no... yellow is +12v, red is +5v, blacks are ground (0v) you can't add them to get 17 volts, 12v is all you're gonna get. If you connect + to yellow and - to red you'll get 7v. (If you connect red and yellow to + and black to - you'll trip your powersupply because you're connecting +12 to +5 without any resistance - enough current can flow to turn your wires into a toaster, but you're power supply will stop that first)... Easiest/Best bet is to get a separate 24v transformer that plugs into the wall and run it into your case.
Thanks for that, too much hassle to get separate transformer, it was just a spare fan I had lying about that I wanted to put in my brother's case, I'll get another one
