An HDB8237 HDEC Series four segment backplane provides a system integration methodology that enables four-in-one system consolidation in a single rackmount computer enclosure. This multi-system within a common enclosure integration approach enables divergent software applications to be totally isolated, yet does not require physically separate computer systems; thereby, saving on the total costs of system ownership and integration. This innovative four-segment backplane design supports an industry standard x16 PCI Express 3.0 plug-in card within each segment that interfaces directly to the processors located on that segment’s HDEC Series system host board.