At the wall switch.
That's because these devices continue to suck up energy while they run in standby mode. Ideally, you'll have a circuit running throughout the office from which devices that should go totally dead after hours. Then just trip the single switch or breaker or isolator that controls this circuit, and you don't have to worry about the trickle current drain from all the devices on this circuit.
In reality, people will probably rely on power strips to turn off a group of devices, and it's left to the individual to remember to turn off their devices before leaving the office.
There's also the worry that regular powering on and off electronic devices is going to send lots of little current surges through the circuits, which may end up weakening them, or making them more predisposed to failure.
There's a free power management tool for desktop PCs on hp.com that I've not tried yet - but is supposed to provide better control and power savings than the power applet that comes with XP/Vista. Will have to look at this and see if it's of help.
On the printing side, there's INSTANT ON technology, which makes it possible for printers to enter deep-sleep (ie very low power consumption mode) when not in use, and then rapidly warm up to handle printing jobs when the spoolers start kicking in.
Battery Care:
ReplyDeleteEach time you charge or discharge a battery some of its life is used. The more often it is recharged and discharged, the faster the battery's useful life will degrade. To maximize the lifetime usefulness of your battery, charge it fully and remove it from the laptop when using A/C power. Only use the battery when A/C power is not available, and keep the battery stored in a cool dry place between uses.
Do you know how much you're spending on data centre power? Most companies are not as big as a certain search engine giant who spends more on power than it spends on hardware. It's worth taking a measure of the electricity costs of your server - even if these are low enough for now, it's good to know.
ReplyDeleteDo not use a screen saver. A computer using a screen saver instead of sleep settings uses 28% more energy.
ReplyDeletePower down all office equipment. Turn off PCs, monitors, personal printers, equipment and task lighting at night and on weekends.
Be conscientious about lighting. Turn off lights as you exit conference rooms, labs and other rooms with local lighting switches.
Turn off unused lab equipment. During holiday closures, many tests and activities in lab areas cease. Please check to see if the related equipment and dedicated lighting can be turned off.