How many hard drives and optical drives can you hook up to a mobo. I was reading in some forum that this guy hooked up 4 hard drives and three optical drives. I am about to start building my first computer and was wondering about this. I know this question has probably been asked 600 times, if some one would direct me to were it has been asked before that would be fine. I was also wondering does it vary from mobo to mobo? Thanks