RTFM!
Step one is reading the motherboard manual if you haven't already.
Step two, if you've done that and are still confused, is to be more specific in your post, and even provide pics if possible.
This helps a ton, its responses like this that are killing good communities. This guy/gal comes here for help and gets the kind of answer I would only expect on linux forums. If you don't have anything constructive to add, please keep your posts to yourself. The above adds exactly zero to the conversation.
Please dear sir, if you read the motherboard manual, it will answer your question and others. Many motherboard manuals even have pictures to guide the inexperienced. Have a nice day.
The OP provided no specifications or nomenclature for the motherboard he's using. Reading the manual or even asking where to find the manual if he doesn't have one, wasn't asked.
I'm paying by the pixel here. Read the fracking manual! Feel better?