Comment: C3 (Score 1) 149
I would suspect C3 sleep states are supported on a majority of systems by now. Perhaps I was just lucky when I picked up the hackintosh board a few years ago. Now, I simply use a reasonably long idle timer and the system goes to sleep/power off. It takes a few seconds to come back out of that state and wholly beats a cold start.
I guestimate my home system gets about 3-4 hours of usage each day during the weekday. In addition, there are plenty of other device around the house which support other core services.
I don't know if it's so much about being green as it is the sensibility to turn a light switch off if it's not in use.