Well, I would also add about fan wires, the red is ussally the 12v not the 5v. Just incase you don't get confused about the psu wires, where 12v is yellow and 5v is red. Still black is almost always ground in everything. Also, if you see a fan with red, yellow, and black. The yellow is for monitoring rpms(when pluged into the motherboard header), the red is 12v, and the black is the ground.