Does someone know the answer to the Caleb_2 problem, because I got an "almost" identical problem. The difference however is that mine work pretty well using the green wire (even though I only get 10,55V on the 12V). So I tried to power it up using the purple wire (since I read in a post that it coul allow more power too pass through) and that's were I get the same problem as Caleb: a high pitched buzz. I tried to connect the pw_good at the same time and it didn't do anything more, just that damn buzz. If someone could help me on this, I would be gratefull because it could ("maybe") allow me to resolve another problem: whenever I add my Delta 80mm 68cfm to that second power supply, the power supply just stop fonctionning. Now let me elaborate a little bit more on this... When I power it up, the fan start spinning for about a second and then they all stop. All I have to do is to switch it off and then back on to experience the same thing untill I remove the Delta fan.
Now I know this isn't a problem with my fan's wiring, since I can get it to work on my main power supply. Strange isn't it? Even more when considering that I only connected about 10 fans and a digital doc on it yet (and it is a 250W PSU that's supposed to output 9A on the 12V line).