chip must include a central processing control unit an accelerated graphic port control unit and a south bridge chip control unit not shown since the input output i o ports of the north bridge chip have to transmit signals to and from various i o ports of connected devices the substrate 300 within the north bridge chip must also supply power to these devices as shown in fig3 the north bridge chip has a power layout that includes a ground region 310 and a plurality of power source regions 315 320 325 330 and 335 the ground region 310 is used for attaching a die and ground leads of the die the power source 315 provides a supply power v cc1 to the input output i o section of the accelerated graphic port control unit of the die in general the power source 315 provides 1 5v the power source 320 provides a supply power v cc2 to the input output i o section of the south bridge chip control unit in general the power source 320 provides 1 5v the power source 325 provides a supply power v tt to the input output i o section of the central processing control unit in general the power source 325 provides 1 5v in this invention the power regions connected to the core sections of various units within the die are divided into a first core power region 330 and a second core power region 335 both power regions provide a voltage of about 2 5v the first core power source 330 provides a supply power v.