I am building a new PC and I haven't done this in a few years. It will have all the latest tech stuff. I got my PSU in the mail and I am looking over the cables (it has a lot) I thought it was a mudular PSU so I could only use the cables I need but instead it is a hybrid (some wires attached and some can be added/removed instead of all of then being removable).

1)
So I am curious, I believe all my hard drives and optical drives are powered off of a sata power cable so does that mean I probably do not need any of the 4 pin molex cables? Or are these used for other things?

2)
I know the 24-pin cable goes to my motherboard.

3)
I have some 6-pin cables that are labeled pci-e which is new to me. I read these are for some grapghic cards and stuff. I have 2 grapghic cards but they do not require a seperate pci-e power wire be hooked to them. So are these pci-e wires just to power pci-express cards? Or for other things as well?

4)
I have a 4pin ATX 12v wire, what is this for?

5)
8 pin EPS, what is this for?