1. A connector having a housing with a surface, wherein the connector is configured for attachment to a circuit board with the surface facing the circuit board, the connector comprising:a plurality of pockets in the surface; and
a plurality of contacts held by the housing, each of the plurality of contacts comprising a mating end, a mounting end opposite the mating end and disposed within at least a respective one of the plurality of pockets, and an intermediate portion that extends between the mating end and the mounting end;
the plurality of pockets are arranged in a plurality of rows;
within each row, a first portion of the pockets have a center-to-center spacing in a row direction of a first distance from at least one adjacent pocket of the first portion of the pockets, and a second portion of the pockets have a center-to-center spacing in the row direction of a second distance from at least one adjacent pocket of the second portion of the pockets; and
the second distance is less than the first distance.