I just bought a cooler master elite 310 for a computer that I will be building soon because it seemed to be good for the price. I haven't used it yet it it seems good so far. One thing that confused me was the 120mm case fan that came with it, its a regular case fan with a 3-pin plug at the end, but there is what looks like a 3-pin to peripheral adapter plugged into it. I was wondering what exactly this is used for, should i just plug it into the PSU? or should i just forget about it and use the 3-pin with my motherboard.