|Basically everything needs to be in one way or another. If you have no sata connections on the board then it makes no sense to buy sata drives. The big things I guess though would be make sure the board will fit the case the cpu will fit the board the ram will work with the board the psu will not only comply with the board but other components as well such as video card or if your going to have multiple hdds or cd/dvd drives. If the video card requires it does the psu have a seperate connection for it?|
No some things are not that ultra critical but you can save yourself some time and grief by matching everything and doing some research.