It will probably just pick up the config just fine, BUT it might also need to be imported.  Boot to CTRL-R very first thing ... if it shows no config and the drives as Foreign, then highlight the controller, F2, Foreign, Import.  
Hey there, my first post thanks for having me!   I am fairly new to server maintenance and have a quick question. We have a Perc 5i raid controller card that has swollen caps and is preventing the system to boot. We put the drives in another PE860 machine and they boot fine.   I have ordered the new card, question: will there be any configuring of the new card to see the array properly, or will the card pick up the raid config automatically from the drives?   Thanks again, DaveS
blown caps on a Perc 5i card - swap procedure