The Backplane - HP Vectra XM5 4 Supplementary Manual

The ROM on the new system board will have a blank serial number field. This will be detected
automatically by the BIOS, which will then prompt the user to enter the serial number which is
printed on the identification label on the back of the PC.

THE BACKPLANE

The HP Vectra XM 5/xx series 4 PC has a new double-sided backplane. The left-hand side, as
viewed from the front of the PC, is the same as that for the HP Vectra VL 5/xx series 4 PC .
The right-hand side, as viewed from the front of the PC, has the new PCI slot that
accommodates the Enhanced Ethernet 10 BaseT Network board.