Canyon Country, CA
I'm running a VIA C7 MB at 14 Watts
If you want to save power use SMPS power supplies, not linears. The machine never crashes but I reboot it every couple weeks anyway.
I got rid of most of my Class 2 (linear) wall warts; the ones that remain 9Class IV) are on easily used kill switches. My electric bill went from $110/month to ca. $70/month. And I have a 24/7 ham radio station.