Well, at the moment, neither do I. Actually, that HP is Quad "Xeon" 333. PPro OverDrive chips had 512K full speed cache and 48-bit addressing, thus essentially precursor to P2 Xeon (which started at 400MHz on 100MHz FSB). The offline machines are all P2s, except one Dual Xeon 550 and a Celeron 1.3GHz.
Online are: Three Barton 3200+, P4/2.4C/800HT, two P4/2.53/533, two P4/2.4B/533, P3-S/1.26/512K, two P3/933, two P3/667, four X3/500, four P3/500, four P3/450, and a Celeron 366. Switching to diskless systems would sure save a bunch of power.