Here is what my powermeter thinks my desktops are using with various options:
System 1 ("wavehh", FreeBSD-4-stable): - 1300 MHz Celeron Base power consumption with all drives: 99 watts - No drives connected: 82 watts
System 2: - AMD Athlon XP 2500+ 1.83GHz Base system with all drives: 148 watts
Ouch! I've tested a bunch of 'business-grade' desktops around my office, and they all run 40-60 watts during normal use (not including monitor) with peak power at boot time up to 70-80 watts. This includes some P4s with lots of memory, CD-RWs, etc. (The one exception is an AMD Duron system; it seems that the AMD processors are uniformly power-hungry.)
I'm told that Mini-ITX systems pull around 20w, if you're serious about low power: I'm eyeing one of those for my office mail server. Any decent laptop should be under 30 watts.
Tim
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