Power consumption and performance

Apple Mac OS X on x86: a first test: CNET.com.au: Software: Operating Systems: "Test with 1.2GHz Pentium M Windows XP Mac OS X x86
Power consumption (idle) 15.2W 15.7W
Power consumption (maximum) 21.4W 21.5W
OS startup time 23.5s 20.5s
OS shutdown time 9.5s 9.4s
Free RAM after OS load (from 512MB) 290MB 324MB"