I just picked up a WD 250G SATAII capable hard drive. I will install on an Asrock dual 939 SATA MotherBoard. There is a separate connector for SATAII on this board. My question is are the SATA and SATAII connector cable's interchangeable or is there a different cable to get full functionality of SATAII? Thanks. My PSU is Antec neopower 480. thanks.