This is the right-hand counterpart to atiSystemLeftBoardID, identifying the right board in a split-chassis Summit switch design. An admin verifying that a chassis wasn't assembled from mismatched board revisions, which can cause subtle interoperability issues between the two halves, would compare this value against atiSystemLeftBoardID rather than reading it alone. If a repair technician swaps only the right board and this ID doesn't match the part number on the shipped replacement, that mismatch surfaces here before the switch is put back into production.