If it's a socket 478 , 3,06Ghz with fsb133 (quad bumped 533), the "old high perf" P4 , this is a 32 bits only without any virtualizations or dep/nxbit features. Latest P4 on socket lga uses higher fsb and frequency is 3,00Ghz or more and has emt-64bits, virtualizations and dep/nxbit protection.