Well, it depends what you want them for.
A Pentium M is basically a Pentium 3 mixed with a Pentium 4 - so it has latest features but a short pipeline. This makes it very good at unpredictable tasks, like gaming, but not so good at predictable ones, like video encoding.
The Athlon 64/Sempron have a slightly longer pipeline, meaning that they are good at games but good at everything else too.
The Pentium 4 has a very long pipeline, making it not so good at games but very good at video encoding.
The Pentium M also runs a lot cooler, it doesn't even need a fan on the heatsink. The downside is that their quite expensive, nearly £200 for a 2ghz one, and a good motherboard will cost you nearly £150. If you game a lot, want a quiet PC, or just want something different, their excellent.
arrizx said:
Pent M. Take Any p.M speed and multipy it by 1.3, to get the equalviant speed of the p.4. If that makes any sence to you.. lol
No - your wrong.