These gains can be achieved without the need to relay the board. Since the 3M™ MetPak™ HSHM backplane connectors are based on IEC 61076-4-101 - the industry standard for 2 mm hard metric connectors – these fully shielded socket connectors are footprint compatible with unshielded HM connectors on a typical single board computer. That means the unshielded socket can be replaced with a press-fit shielded connector with relative ease.