hi there, a friend wants to buy a new computer from strach and ask me for some advice. seems that sata 2 hard drives are much cheaper then sata hdd for some reason. Is it possible for a sata 2 drive to work on a sata only mobo? i mean do the connectors fit and stuff? i dont want to go into the debate about which is faster or theoritically faster, just want to know if its compatible with each other.