Barring something more important coming up, next month I am going to get some much needed RAM. Is there anything I need to know? I've never bought RAM or anything like that before and need to know if I either need to pinpoint a particular kind for my system or can just use any kind. I don't mean like if I need DDR or DDR2. To put it perspective, I was looking up prices on a site and while it had some decent deals, after putting in what kind of motherboard I have, it listed RAM chips they say were 100% guaranteed to be compatible, but were double the price of the other stuff.
In english, is there really such a thing as RAM that is meant to be used with a particular motherboard, or are they trying to gouge me?