If I buy this pc parts bindle will i require a power supply?

The bundle is this : a href="http://www.overclockers.co.uk/showproduct.php?prodid=BU-035-OB&groupid=43&catid=339&subcat=" rel="nofollow"http://www.overclockers.co.uk/showproduc…/a If i buy this will i need tto buy this power suplly : a href="http://www.overclockers.co.uk/showproduct.php?prodid=CA-148-AN" rel="nofollow"http://www.overclockers.co.uk/showproduc…/a ?