I am not versed in the ways of wires, so I'm hoping for a little info. I ordered a replacement fan for an older power supply that only takes a 2-pin connection, but I didn't realize it was sold ...

My motherboard has a 2x12V, 8-pin power connector on it (in addition to the 24-pin main power connector. The power supply I have only has one 1x12V, 4-pin connector; do I need both of those power ...