If it is a SATA hard drive, you will need a a connector
if it is internal. They do provide the connector to the motherboard, but you may have to find someone that sells the power connector - I bought both from a computer shop for $10.
The latter is an alternative where you will can use a PATA on How To above. This is that link: http://howto.cnet.com/8301-11310_39-57404939-285/how-to-build-your-own-external-hard-drive/ Darrell