Reading from wikipedia, apparently all of the Williamette (180nm) chips were 32 bit; x64 came in with the prescott (90nm) netburst pentiums, although it was disabled at first. Well, you learn something new every day; most pentium 4's you see in the wild these days do support x64, but the feature isn't universal.
]]>Hyperthread, Intel D865PERL Mobo
]]>Running this on a Dell Latitude D820.
]]>Intel Pentium M LV (758) @ 1.50GHz
]]>model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz
> grep 'model name' /proc/cpuinfo
model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz
model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz
1. Intel(R) Core(TM)2 Duo CPU T5450 @ 1.66GHz
2. Intel(R) Pentium(R) 4 CPU 2.93GHz
Ah, despite the 'Core' in the name it's actually an enhanced Pentium microarchitecure, and chronologically the one before the actual Core microarchitecture chips, it you ignore the whole netburst disaster. Funny old Intel.
]]>this is a macbook 1,1 from 2007
]]>