I'm in the process of building my first desktop. I have almost everything put together, but I don't know what to do about the power button. I am reusing an old case from my broken Gateway desktop that I got back in 2002. The power button on that is a 15 pin connection (not the big square pins like with the power supply, but 15 very small ones). It's a black connector and there are a few wires twisted together that are part of it. On my old mobo, there were 15 pins sticking out (which is where you were supposed to connect it0. There doesn't seem to be anything like that on my new mobo. How will I be able to connect the power button? If it turns out that I cannot connect the power button (since it's incompatible) how will I be able to power up my desktop? There is an on/off switch on the back of my power supply. If the power button doesn't work, will I be able to use that to turn on my desktop?