Opty: system in signature @ 1.53 vCore + 3x S-Flex case fans + electronic fan controller/temp monitor = 300 watts
Opty: same system but 2.7 GHz @ 1.45v = 270 watts
4400+ (89w chip): 2.6 GHz @ 1.45v + 1x S-Flex fan + GeForce 6200 + HDD + CD-ROM = 170 watts
I run an old 2100+ XP and both of the above systems 24/7/365 - power's cheap in Missouri ...