I'm trying to wire a PC fan to run from the wall outlet. I have read that I need an AC/DC 12v adapter with a minimum of .33a to match the specs of the fan. Is this true? Have any of you done it differently with success? also, what do i do with the 3rd wire on the PC fan? I have red, black and white. In my experience red would be positive, black negative, and a green wire would be a ground, but wth is this white wire? The guy at the PC shop said it was some kinda censor wire, but I don't actually trust the locals to know what they are talking about, as they tend not to, even if it technically is their job to know.