guittarzzan

I haven't messed with anything in bios etc. At this point, I'm not even sure if I connect one of the connectors or both. I don't know a ton about this stuff and don't want to fry my mobo by connecting a cable I'm not supposed to. I would assume that the large 4 pin connector attached to the ps cable would be all I needed.
Is the smaller, 3 pin cable just for if I want to control fan speed etc? I could care less about controlling the speed as long as it's spinning at a reasonable speed. I just want it to spin and move some air.
Can someone enlighten me on the two cables and what they're for?

thanks.