Thanks. Is there any advantage to controlling the speed? (can that be done with only 3 out of 4 pins?).
For the first paragraph I mean there are things to plug into the motherboard from the case - for example the cable from the power on button, the reset button etc and I can't find the spot on the motherboard for them at all? They are all single or dual pin but there's no spots like that on the board.
I wondered if it might be that the motherboard has a single large block that you plug all of them into? I thought I found it but none of the abbreviations matched.