In article <3F7D5DE5.1040400@iki.fi>, Martti Kuparinen <martti.kuparinen@iki.fi> wrote: >Hi! > >How can I detect the "second" CPU on my 2.8GHz Intel P4 with HT? >Hyperthreading is enabled in the BIOS... > You need MPACPI defined, because the second CPU is only defined in the ACPI tables, and not the MPBIOS ones. christos