These places hire people with no idea about electronics. If you go in asking for something specific, they can help you by looking it up on the computer, but other than that it's a guess game. You have to return crap to the store till you find what you actually needed. One person tried to tell me that the brand of ethernet cable I bought could actually increase my bandwith. And it's not just this store, it's everywhere. If you are going to specialize in electronics, please, hire people who know something about it.