"BAR" wrote in message
. ..


Regardless of whether it has a sleep mode or not unless it is a server
class system it is not "designed" to be on 24x7. Server class means on
24x7. Desktop means on 9 to 5. Laptop means on when you are using it.


That might be what "they" say, but I don't buy it.

The killer for electronics, particularly high density power devices like the
CPU, is thermal cycling.
Components that consume power have a higher failure rate when they are
routinely cycled from operating temperature to ambient, then back to
operating temperature.

Other components, like the fan might fail, causing overheating and failure
of the electronic devices, but leaving electronics on all the time is better
for them in terms of life. An incandescent light bulb is the same deal.
One that is constantly turned on and off will fail sooner than one that is
left on all the time.

Eisboch