Intel Pentium 4 is a power hog
After Intel announced the first facts about the architecture of the Pentium 4 yesterday, the first values about the power consumption of the new CPU will follow today. Accordingly, with a core voltage of 1.7V and a clock frequency of 1.3GHz, it consumes a whopping 36 and at 1.4GHz even 39Ampere.
This would mean that Intel's new CPU would be just as 'hungry' as an AMD Thunderbird with 35 amps at 1GHz (Intel PIII Coppermine on 1.13GHz consumes 23A). Furthermore, Intel has published motherboard design specifications, according to which they should deliver up to 52Ampere in order to be prepared for the P4. You will probably have to fall back on a 300 watt power supply if there are other power-hungry peripherals in the system in addition to the P4