I've got a Cooler Master eXtreme power 500w [RP-500-PCAP]
and as so many other in this forum my psu sounded like a helicopter even when my computer was idle.
I bought it on the web and since it would cost me a lot to get it replaced I decided to do something to it myself.
This is how I've connected it:
When the switch is set to the right the fan is in 5V mode and when its to the left its in 12V mode.
If i start the computer with the switch set to 12V mode everything is fine and the psufan is working at full speed.
And when i switch to 5V mode everything still works good and the psu is really silent.
So far so good, BUT When i try to switch back to 12V mode the computer shuts down.
After that i can start the computer again without any problem.
Does anyone have a clue about were the problem lies, cause i cant think about anything that could cause the problem.