A connector system having right angle, board-mounted header and receptacle connectors includes both a power interface and a signal interface for transmitting power and data signals there between. Optionally, the connectors may have features that allow the corresponding circuit boards to be offset. The connectors may have features that provide guidance for alignment of the header and receptacle connectors. The connectors may have features to enhance the electrical performance of the conductors defining the signal paths through the connector system. The connectors may have features that orient the components of the header and receptacle connectors for mounting to the circuit boards to maintain the true positions of the contacts for mounting to the circuit board.