FC5 at boot reports: Checking 'hlt' instruction... OK. SMP alternatives: switching to UP code Freeing SMP alternatives: 16k freed CPU0: Intel Pentium Pro stepping 07 SMP motherboard not detected. Brought up 1 CPUs FC4 found both processors quite happily... This is an old Compaq Proliant 2500 with 2 x 200MHz Pentium Pro processors Anything I can do to persuade FC5 to look harder? Gordon Hay