Shutting down computer or leaving it on? Which is more cost and energy efficient?

Question

Shutting down computer or leaving it on? Which is more cost and energy efficient?

Answer 1

I agree with Running.    But how often do you ever wear out a computer?   I've seen TRS-80's and Commodore 64's still working.    Within a year or two most computers are out of date, so who cares if their usefull life is shortened from 20 to 15 years.

Answer 2

when you are done for the day turn it off

Answer 3

Definitely shut it down.  The wear and tear at startup is very minor.  You'll replace your computer for technological reasons before it physically wears out.

Answer 4

Shut it down and flip the power bar off.

Answer 5

I believe from an energy stand point, it is always better to shut down the computer if it is to be idle for a long time, like hours.  

The counter argument is that each time the computer is S/U and S/D, the hard disc and other components go through a bit of wear and tear, more than just in operating mode.  

In my opinion, the older the computer, the higher the benefit to shut down the system.  Or, as a compromise, shut down the monitor at least.

Cheers