Differentially coupled connector

A connector comprising:

• a housing with a mating face and a mounting side, the mounting side configured to be supported, in operation, by a circuit board, wherein a slot is positioned in the mating face, the slot having a first side with a first set of terminal grooves and a second side with a second set of terminal grooves;
• and
• a first terminal set positioned in the housing, the first terminal set supported by a first block that is inserted into the housing, the first terminal set forming a first row of terminals in the first side of the slot, each of the terminals in the first terminal set having a contact and a body portion that extends to the contact, the first row of terminals including a differential signal pair surrounded on both sides by a ground terminal, each of the terminals in the first row being configured such that the contacts in a first row are at a constant pitch and the body portions of the four terminals are substantially wider than the contacts such that the space between the body portions of the four terminals is less than the space between the contacts;
• and
• a second terminal set positioned in the housing, the second terminal set supported by a second block that is inserted into the housing, the second terminal set forming a second row of terminals in the second side of the slot, each terminal of the second terminal set having a contact and a body portion that extends to the contact, the second row of terminals including a differential signal pair surrounded on both sides by a ground terminal, each of the terminals in the second row being configured so that the contacts of the four terminals are at a constant pitch, the body portions of the four terminals in the second row being substantially wider than the contacts such that the space between the body portions of the four terminals in the second row is less than the space between the corresponding contacts, wherein the differential signal pairs are configured to support a 16 Gbps data rate.