As far as I know, the P2706T is not a specific mainboard, but merely a version of the HP e-Vectra PC. There are other versions of this computer, with different CPU/RAM/HDD/... configurations, not named P2706T (see http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/lpv09426/lpv0...), but apparently they all share the same mainboard.
I have a P2024A, and the outputs of
lspci -tvnn superiotool -dV msrtool
match the ones supplied by Pawel for the P2706T. The board itself is only referenced as part no. D9896-63005 by the HP docs (see above) I've found so far.
Regards, Joseph